I have updated
the Minecraft topic at my web site, bringing it up to date with changes, adding many new links, and information about my new world. Also, I didn't previously announce this:
I am running a Minecraft server. I've been running one for a while, but it had a rocky start trying to run on a shared Linode. It now has a dedicated machine (though one which is rather old and running on a home cable connection) and is running 24/7.
The address is: mc.switchb.org
This server runs a copy of my single-player world, updated each day, so changes you make are not persistent (except for your inventory). This is a place to tour, or use for building experiments, not to live in. However, I have attempted to make it suitable for multiplayer use, with direction and instruction signs and multiplayer-capable rail stations (though most of the rail tunnels are single-track).
Feel free to suggest improvements to the facilities, or additional builds.
(Note for those who have tried the server before: I recently fixed a problem causing new players to spawn nowhere in particular rather than at the spawn station.)