Thanks, takwu-I stand corrected!
Although, the connection looks alot like USB-it is not, it is actually the "HP Serial-RS232 Connector" that connects the External Keyboard to the Jornada 680, 690, 720 & 728 that I know of. The keyboard fits the connection on the back of the Jornada 680, 680, 720 or 728 and was made specifically for the aforementioned Jornada HPC's.
I don't know if it will connect to other Jornada's
(HP Pocket PC's
).
wildbill
PS. Where do I get a tricorder-somedays I just want to get beamed up!!!