Wow some of you have some high end systems! I thought I'd have everyone beat, but I saw several that were nicer than mine...
Main Rig
Custom built for us by someone, don't know who but I wish they let me do it!
Dual Xeon 3.2ghz
2GB ECC RAM (unkown speed)
Seagate 36GB SCSI hard drive 15K rpm (everything gets stored on the network)
ATI Fire GL X1 256mb
3 Compaq 19" LCDs, together at 3072X768
T3 connection
Phone rig
Some Dell crap which is still extreme overkill for what it's doing:
P3 1.4ghz
512mb RAM
30GB HD
integrated graphics
NEC 19" LCD
Reference PC
The one I mostly use for internet/email, which happens to be the slowest:
P3 700mhz
128mb RAM
9GB HD! (I just complained it was full and got myself a new 80GB Maxtor)
integrated graphics
Dell 19" LCD
So total I've got 5 19" monitors in my face, 10 hours a day, and unfortunately none of that time is spent gaming...