I got one of these too, quite heavily upgraded with 2 Hard drives (I forget the size), XLR8 400Mhz G3 card, ATi Rage, SCSI I card, 2 Port USB card and with OS9.2.

Really powerful, can run Quake 3 Arena quite nicely though older Quakes are a breeze. Even Unreal Tornament runs ok if you turn the levels down!