So about the size of a business card, and almost half as thick as an iPod nano. Not sure how sturdy or flexible it is, but I'd guess that even if it fits in your wallet you'd never want to sit on it. At least it would work well in a pocket.

Wouldn't it be easier and cheaper just to buy a 4 gig 133x SD card for around $50 after MIR? For a couple extra bucks you can get a keychain cardreader if you need to use it as a flashdrive.

I agree, #2. Where's the connector, anyway? Is it a PCMCIA card? Those slots are going away on the newer laptops anyway.