You can check progress on WebGL client here: http://manicdigger.sourceforge.net/webgl/game.html
2012-10-22 nightly version added grenades.
I’m making a mod that transforms the game into a first-person shooter.
tkgermany sent a few patches. (forum thread)
Based on Mineserver.
Doors can be opened by clicking on them when not having a block in hand. A bug: