The following USB sticks work on the Raptor.

Centon 2 GB speed 99 MBits/S
Kingston DT101 G2 Drive 2 GB speed 146 MBits/S
Kingston Data Traveler 4 GB speed 120 MBits/S
Kingston Data Traveler 256 MB speed 64 MBits/S
Memorex Travel Drive 2 GB speed 99 MBits/S
Ridata 2 GB speed 117 MBits/S
Super Talent 4 GB speed 35 MBits/S
Toshiba U3 Smart 4 GB speed 72 MBits/S

Some times, the speed test may not work and the drive being tested has to be unmounted and reinserted.
Coding needs tweaking? Doesn't matter if it's the front or rear ports.