Yeah me too! I took the Jornada out of the box, was like, "OMG! USB?!" And then I realized the next day that it was not USB. I don't remember if I tried to put a flash drive in it or not...
It is in fact good ol' Serial for a Jornada (I believe)
I noticed that familiar looking port on my 620lx when I got mine, but I did not have a cable bundled with mine, but I did have an AC adapter, Dock and not to mention a pretty good battery.
Finally got my cable yesterday, and with a Win XP virtual machine and a Serial to USB adapter I bought, works like a charm. Hence why I decided to join, since I finally got all the stuff in order for that lovely Windows CE computer.