I actually thought of making the server yesterday. It would be fun, but absolutely unproductive. If we procrastinate in Minecraft while the world will burn, I'll never forgive you.
(What the hell, I'll try to make one. IIRC, it should work out of the box now.)
UPD: I started one. Seems to be accessible from the outside, so PM me if you need the address. And please don't post it in the open (including the main chatroom), because it has absolutely zero security.
Also, I have no idea how many players my PC can handle.

UPD: I've set up an actual server instead of using the "Open to LAN" feature. Now it doesn't fall when I log off.

I've already set up a Meta-bunker, so come visit me. Position: X=-179, Y=64, Z=177.
Also, the location couldn't be funnier, as there are 2 colliding biomes, and a chasm with lava in the backyard.
For the record, the world seed was "The Wall Will Fall".

One more thing: If you didn't buy Minecraft, go ahead and use a pirated one. Notch officially doesn't mind.
