Some time ago I salvaged parts from a trashed blue iMac G3, including the mainboard. It wasn't an older or newer model, sorta middle ground in this case. It's kind of feature-less, such as no wireless port I think and no on-board VGA port. The holes in the PCB for a through hole port are still there though, but I don't know if they're connected.
Anyway, what do you guys do with a bare mainboard like this?