Testfreaks.com has a review of Verbatim's interesting "always on" external USB drive.
They have a small LCD screen on them that shows you the remaining capacity even when they're not plugged in. I wonder what the capacity they report is based on, base 2 or base 10...
Anyway, they could be really handy in a shooting/editing environment if they were firewire and held more than 500GBs. Kinda like a firestore only reasonably priced with bigger capacity. I can imagine the hassled avoided by just having a pile of these on a shelf and grabbing one based on it's remaining capacity by glancing at the display.
It would save a lot of masking tape labels. At least for me. Verbatim's page on the drives is here.