@afxgroup
Was working on it, unless he has restarted then he isn't working on one.
The PL2303 is the chipset to go for. There is source out in the wild but not for our USB stack (see eg. Poseidon PL2303 driver+source at
http://thylacine.boing.net/updates.html)
I've tried adapting it, and fixing/finishing rwo's driver but I didn't get anywhere as I know next to nothing about writing USB hardware drivers.
I have a little USB-Serial device here I wanted to have a play around with, but the USB side of things stopped that.