Neato, welcome, damn you (for lowering my ranking).
That beats my crunching.
I've got a 400MHz iMac and a 400MHz B&W G3.
They both do seti too.
I've also got a PM7100/66 and a PM 6100/66.
And a P3-550 and 600, but they are only 4 hrs per day (at work).
And a P2-450.
Other machines are SETI only.
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G3 400, 384, 12 + 75 GB
PM 8500 - 150, 48, 1 GB
PM 7100 - 66, 32, 700 MB
PM 6100 - 66, 40, 4.5 GB