Jumping jack flash-drives!
While supplies last (and they definitely won't last long), Buy.com has the Kingston DataTraveler 109 16GB flash drive for $10.95 shipped--the lowest price I've ever seen on a drive with that much storage space.
Update: Be sure to select the "budget shipping" option. Also, remove the CA security option that is automatically added to your cart.
Though it's hard to tell from the picture, this drive is tiny. I've got the 8GB version, and it's barely longer than the end of your pinky finger. Because it's looped at the end, it can easily clip to your key chain.
This is the black-and-white version of the drive. Other colors are available, but not at this price--they're all about $4 more. (Even then: sweet deal.)
Kingston preloads the DT109 with its UrDrive software, which includes a Web browser, an MP3 player, a photo viewer, and the like. It also allows you to install programs on the drive and make them portable, meaning they leave behind no trace on the host PC when run.
UrDrive is completely optional to use, of course. You can always delete it and recover that extra smidgen of storage.
The drive comes with a five-year warranty, and Kingston offers 24-7 tech support.
This is a crazy-good deal on a huge (but tiny) flash drive. Grab one before they're gone!
Bonus deal: Today only, Best Buy is offering 20 percent off all iTunes gift cards. That means you can get a $15 card for $12, a $25 card for $20, a $50 for $40, and so on. The "cards" are delivered electronically, so there's nothing to ship.