Works really FAST and its OK for virtualisation - you can run it in as little as 256MB RAM.
Note - you might find USB support a bit limited - don't expect USB 2.0 (although some XP drivers
*might* work - remember you will be running on Virtual Hardware). USB 1.1 should work.
There are some service packs around - I think W2000 went as high as SP4 (at least W2000 server did).
You probably won't be able to run W2000 on a REAL machine unless you can find some SATA drivers and slipstream these into your W2000 installation - again the XP ones might work -- but as a VM you won't run into this problem.