20 PII Dell Celerons

I just inherited, through my school (by way of clearing out a local business' closet) 20 old PII 400 + 440 MHZ Dell Celerons w/15" monitors and a few mice/keyboards as well as a honkin' handful of 32 meg memory (I guess they kept all the memory upgrades). Some have 6 gig HD's, some have a funky SCSI cabled laptop card interface in the 2nd floppy slot, some are stripped to the motherboard but most are repairable.

Can I do anything with them or have we simply transferred a closet full of junk to MY house?

You, sir, just volunteered to build a Beowulf cluster.