.. on a trip to the C world again

Testing lua embedding and mongoose http server.
Lua is great to implement business logic in the C based app.
It lets you bee less woried about memory leaks, stack overruns, invalid pointer etc.

online collaboration in realtime

Some projects for online collaboration:
http://etherpad.org/ - realtime colaboration for text editing
http://socket.io/  - bidirectional realtime communication platform
http://XMPP.org - realtime presence & message protocol