Implementable right now (but not necessarily important), with caveats
(unavailable components that will limit what can be implemented right
away), in order in which they will likely be done:
* TESTING-TESTBED [Nate]
* SETUP
* DV [Nate]
* TBENCH
* TRACEKIT
* FRAGMENTATION [Ji Lu]
* HTTP transport
* MySQL / Postgres plugins (datastore, datacache)
* UPNP [Milan]
* ARM [Safey]
* FS [Christian]

0.9.0pre0:
* HOSTLIST/PEERINFO/CORE/TRANSPORT/TOPOLOGY:
  - hostlist server learns about 2nd peer, but soon forgets (not 
    clear if this is still an issue, or if validation failed or
    if this was an issue with the client's parsing of the reply, which
    was broken...)
* TOPOLOGY:
  - needs more testing (especially F2F topology)
  - needs to re-try connecting after disconnect (currently, it
    initially triggers a connection request, but if that connection
    fails / goes down, it does not retry in a timely fashion;
    cause seems to be the 'blacklist_after_attempt' being set to 1h,
    which is rather long -- and should probably be adjusted based on
    the number of connections / known peers)
* CORE:
  - peers do not seem to connect (setkey, ping are there; PONG is sent,
    not sure what else happens; eventually, the "neighbour" entry times
    out and is removed)
* UTIL:
  - load: need way to determine network load (up/down) -- and quickly so!
  - trust: need *fast* way to check/update trust in peers
           (async peerinfo would not be right)
  - scheduler should change OS process priority based on task priority;   
    should make better use of task priorities in general
* TRANSPORT:
  - disconnect notifications from TCP not always as nice as we might want
    them to be (but how can we do this cleanly given that UDP is connectionless?)
  - TCP not used bi-directionally (especially important also for PONG!)
    Need a way for plugin to tell to service that it can *reliably* transmit
    PONGs.  Need *good* way to ensure only one (plugin) session is active at 
    any given point in time; need systematic way to periodically probe latency/
    transport cost changes
  - hostlist testcase shows that (randomly) we jump to an address that
    seems to be a plugin function *after* the plugin has been unloaded
    (directly from scheduler); check that *all* plugin tasks are cancelled
    after plugin is unloaded! (need better testcases for that...)
* STATISTICS:
  - synchronous/asynchronous API (& implementation) is not nice;
    => provide notification-based API
  - does not seem to work with timeouts (especially if service is not running)
* DATACACHE:
  - add stats (# bytes available, # bytes used, # PUTs, # GETs, # GETs satisfied)
* ARM:
  - need to get rid of synchronous API for service starts (cause all kinds of problems)
    [=> eliminate for need to tell ARM about service starts most of the time!] [Safey]
* HELLO:
  - need function to test "equivalency" of HELLOs; use in topology!
* FS:
  - gnunet-publish cannot be aborted using CTRL-C
  - gnunet-publish segfaults if file does not exist
  - on some systems, keyword search does not find locally published content
    (need testcase of command-line tools!)
  - 2-peer download is still too slow (why?)
* Module features to implement:
  - advanced FS API parts
    + namespaces: fundamental namespace API
    + search: SBlocks, KSBlocks, probes, notify FS-service of known results
    + collection
    + location URIs (publish, search, download)
    + persistence support (publish, unindex, search, download)
    + indexing: index-failure-cleanup
    + download: management/bounding of parallel downloads (for recursive dl.)
    + datastore reservation (publishing)
    + gnunet-publish (URI args)
    + gnunet-download (directory)
    + gnunet-search (options, incl. namespace search)
    + gnunet-download (many options)
    + gnunet-directory (man page, options)
    + gnunet-pseudonym (all of it)
    + gnunet-service-fs (remove failing on-demand blocks, stats, hot-path routing, load-based routing, nitpicks)
    + datastore: do active migration support here?   
  - implement adv. FS testcases 
    + getopt API
    + insert: sblocks, loc uris
    + download: loc uris
    + search: sblocks, skblocks, loc uris
    + namespaces
    + collection
  - implement FS performance tests (needs TESTING)
    + insert
    + download
    + search
    + unindex
  - non-anonymous FS service (needs DHT)
    + basic DHT integration
    + CS-DHT-functions (DHT-put of LOC)
    + P2P-functions (DHT-get)
  - setup (RC-pre0)
    + default generation
    + need to settle basic design; do we want to keep guile?
  - testing (RC-pre0)
    + modify configuration to allow controlling connections for non-local starts
    + testbed creation with topology (needs working F2F topology) [Nate]
    + testbed with churn [Nate]
    + implement library for distributed testing [Nate]
    + implement testcases for distributed testing [Nate]
    + test basic peer re-configure [Nate]
    + test topology creation [Nate]
    + test churn generation [Nate]
* WWW:
  - Get IPv6 hooked up
  - change DNS

0.9.0pre1:
* Module features to implement:
  - tbench (RC-pre1)
    + good to have for DV evaluation!
  - DV (RC-pre1)
    + write DV API 
    + implement DV service [Nate & CG]
    + implement DV library [Nate]
    + implement DV transport plugin [Nate & CG]
    + implement testcases [Nate]
    + implement performance tests [Nate]
* GUIs to implement:
  - gtk (RC-pre1)
    + how to integrate scheduler with GTK event loop!

0.9.0pre2:
* Module features to implement:
  - tracekit (RC-pre2)
    + good to have for DV/DHT evaluation!
  - DHT (RC-pre2)
    + implement DHT service (needs DV, DATACACHE)
    + implement DHT library
    + implement testcases
    + implement performance tests
* GUIs to implement:
  - fuse (RC-pre2)
* Plugins to implement:
  - UDP backend (RC-pre2)
    + Fragmentation library 
    + actual plugin
  - HTTP backend (RC-pre2)

0.9.0pre3:
* GUIs to implement:
  - qt (RC-pre3)
    + see discussions @ FISL about integration with event loop!
* Determine RC bugs and fix those!

0.9.0:
* Documentation
  - update man pages
  - update webpage documentation
* new webpage:
  - expand bibliography
  - convert documentation pages to books
  - update books (especially for developers)
  - create good Drupal theme for GNUnet
  - make a NICE download page and figure out how to 
    enable developers to publish TGZs nicely
  - port "contact" page
  - add content type for "todo" items?
  - DNS activation
* Plugins to implement:
  - MySQL database backends
    + datacache
    + datastore
  - Postgres database backends
    + datacache
    + datastore
  - vpn
* Determine RC bugs and fix those!


0.9.x:
* Plugins to implement:
  - SMTP transport backend
  - HTTPS transport backend
    + improved HTTPS support in MHD
    + actual plugin
* Remove KBlocks in gnunet-unindex (see discussion with Kenneth Almquist on gnunet-devs in 9/2009)
* Allow checking of presence of search results and/or content via command-line tools
  (add options to gnunet-search / gnunet-download to limit search to local peer)
* STATISTICS:
  - should use BIO instead of mmap
* PEERINFO:
  - expire 'ancient' HELLOs (those without valid addresses AND that 
    we have not 'used' (for their public keys) in a while; need a way
    to track actual 'use')
  - make sue we also trigger notifications whenever HELLOs expire