Couldn't leave for the weekend without sharing this: Newegg has a Super Talent 4GB USB flash drive for $5.99 with free shipping.
What else is there to say? That's a couple bucks cheaper than I've ever seen a 4GB drive. It has a lifetime warranty; otherwise it's pretty much your basic thumb drive.
Unfortunately, it appears to lack any kind of loop or other keychain-friendly hardware, so it can't replace the drive that just broke off my key ring. Otherwise, I'd be ordering faster than you can say "cheapskate."