This should contain all the major changes.
For minor stuff, refer to the commit log of the repository.
+2011-04-06:
+- Mesh update of node addition/removal is now done asynchronously on client, removing frametime spike
+- Node addition/removal is sent directly only to clients that are closer than 100 nodes to the modification. For the others, the modified blocks are set unsent. (and are re-sent when applicable)
+
2011-04-05:
- Made furnace usable
- Added cobblestone