I had started this same thread in Alt Layouts (now closed and locked), and dorkvader mentioned changing the layout in the OS instead of building a hardware solution. That's fine for the computer I'll use all the time, but I run into trouble when I just need to do a quick bit of work on someone else's computer. Far too many times I've filled in for someone on vacation only to have them return and not be able to type at all because I forgot to change their layout back. Once in a while, I HAVE remembered to change it back and it STILL wants to revert to Dvorak. A hardware solution that I could take around with me and just jam into a USB port would allow me to A) get at it more quickly (no fiddling with settings) and B) prevent my forgetting to set it back.
I'm also, hopefully, starting a new job in the fall where I'll be doing a WHOLE lot more of this kind of thing, so I can just pair the dongle with my Poker for ultimate mechanical portability.
At any rate, I'm really excited about this project. Let us know how it goes.
Dorkvader: If you want to move this to the newly opened DIY section, feel free.