You could wait until Minecraft 1.2
It has about (exactly) 4092 block IDs
We'd probably have to wait yet longer for all the mods to get updated, though.Unless Notch happens to decide that this update is the one to actually add mod support, persay (as in 'they don't break every single update'). Which seems unlikely.
Otherwise, it would be a wonderful, wonderful idea.
...*ninja'd*
EDIT: Since this post is here...
I heard Soli likes goals, so I'll put some potential goals down, in no particular order.
1. Make a space station, of course! It must be entirely above ground, although it can have a 'space' elevator included. It should be made of iron and other metals, as well as glass and plastics if any are around. No stone/wooden space stations
2. The space station must be completely airtight, as in 'no holes in the walls, whatsoever'. All doors to the outside must be airlock-doors (ie, two sets of doors).
3. The station must be completely self-sufficient on food, power, and preferably defense.
4. The station must have no fire whatsoever. Yes, no furnaces, no torches, nothing. (Redstone torches are fine.)
5. The station must be capable of defending itself from attacks, as well as having a decent internal security system.
6. (If Planes Mod is installed) The station must have an airtight hanger or other vehicle launch/landing device.
7? Everyone should have space suits! (Jetpacks and Nano-level armor or higher)