I remember buying some atmel USB adapter thingy to get homebrew working on my PS3-fat, so maybe I already have some of the parts I need. It's also possible I don't, so I'll need to double-check that. But I suspect it's still only a matter of time until a similar method will work for existing USB adapters like the Titan and that newish Chinese one (that lied about FFB support).
Edit: I think it was the Maximus AVR USB. I'll need to see if it's useful or not.
Edit #2: It looks like I may have a use for my Pi with this...
Edit #3: Holy shit, it looks like the board I bought to CFW my PS3 (the Maximus AVR USB) is actually compatible, so I just need to buy the USB-Serial adapter for about $5. Score!
Edit: I think it was the Maximus AVR USB. I'll need to see if it's useful or not.
Edit #2: It looks like I may have a use for my Pi with this...
I know I'd still need the adapters and the Teensy, but that beats having a PC switched on all the time.GIMX can run on smaller targets such as the Raspberry Pi or Thin clients running a small Linux distro.
Edit #3: Holy shit, it looks like the board I bought to CFW my PS3 (the Maximus AVR USB) is actually compatible, so I just need to buy the USB-Serial adapter for about $5. Score!