I got an answer back from Tom about the status of the Earthquake tracker site as of May 29th.

His comments follow mine for each site listed:

Petrolia - Calibrated wrong : Student did not follow cal set up proceedure but data OK
Ferndale - OK but top graph messed up : Yes
Hayward 2 - noisy : Moved to get farther from BART but still see it until 2AM when it goes off
Los Gatos - noisy : Normal
Chalame - Calibrated wrong : There is a radar "sweep" that hits the coils every 5 sec and this raises the DC value--Data OK above this DC level
Timber Cove - Ok except for center graph : Looks like it died on the 15th
Pacifica - not working, no calibration spikes : Data OK, Cal dead (bad serial port)
Peachtree Road - not working, no cal spikes : Not installed yet
Parkfield - not working, no cal spikes : Data OK bad serial port
Colinga - not working, no cal spikes : E-W and Vert OK N-S bad, cal port out
Bittwater - not working, no cal spikes : N-S bad all else OK
Santa Rosa - Not found on server : Working and "busy??"
Ukiah - No data post April 22, 2002 : Dead
Seattle - No data post April 1, 2002 : Dead--- student graduated
Mammoth Lake - Not found on server : Almost completed, not installed
Tom's Place - not working : Data OK, bad serial port