I ran XBench disk test on my new usb, uhh token. Here are the read/write measurements (MB/s) from the test (test system is a C2D Mac 10.5)
sequential
7.52 / 2.89 [4k blocks]
20.4 / 3.54 [256k blocks]
random access
4.49 / 0.02 [4k blocks]
20.37 / 1.08 [256k blocks]
In comparison, my 4yr old OCZ Ralley 1GB has slightly faster read times and significantly faster write times (3-6x faster).
Here's a screen shot of the poker chip with the usb pulled out, set next to a beer cap for size comparison.

"Any sufficiently advanced technology is indistinguishable from magic" ~ Arthur C. Clarke