I have noticed that there is a budding minecraft community on here and since this site is geared around education and IT maybe edugeek contact mojang with regards to education-minecraft and be the pioneers in helping liaise with mojang to gear this into an educational model that can be used in schools. That would be very exciting!
iv been looking into this(mainly because im intrested in how minecraft was developed and dream of making my own 3d game)
i come across this:
Minetest-c55 - Download
its not minecraft, but its bloody close, it has the ablity to connect onto a central server and play multiplayer..
Have a look!?
im playing it now on my lunch break lol.