My Lexar 512 Megabyte Firefly thumbdrive survived two wash cycles in the washing machine.
 
If you have accidentally left your thumdrive in the washer and dryer, please state the brand that survived or failed.

Kingston 1Gig (I think it's the white and gray one) anf the 4 Gig (white and purple)

I have a 256 Megabyte SanDisk thumbdrive that made it through 3 or 4 washings with no problems.

My tiny Super Talent 8GB Pico drive survived being at the bottom of the swimming pool for at least a week!

 
Now that's hard to top,    how could you forget it there for a whole week and how did it get there?

I washed my 2GB SanDisk Cruiser Micro shortly after accidentally nearly snapping the USB connector off.  The front panel USB ports on my NZXT Apollo stick out to the right side, and I wasnt paying attention and layed the whole PC over onto it.  Scary as hell, but I was able to just bend the connector back into place, snap the plastic cover back together, and it runs as well as the day I bought it.

 
Well, if that's a pico C drive that cardio has, it is almost as small as your thumbnail.  My friend just bought one so that's good to know in case he ever washes it in the washing machine.  That thing is sooooo tiny!