I've had my 10v for a while now, and it's become quite the hobby for me.
My current configuration is a triple boot: SL/Win 7/Vista, though I'll probably dump Vista. I've also had stable configs with SL/XP, and SL/Ubuntu.
For a some time I had been wondering if it was possible to run Snow Leopard from a usb flash drive (installed to it, that is). So that's what I've just done, and in fact I'm running it that way right now.
It is almost painfully slow at times. But it's running. Current system is 10.6
I'll try to update to 10.6.3, but I expect there may be some issues there--so I wanted to post this before i proceed with that update. Edit: now running 10.6.3 successfully.
Anyway, it's just something I'd been thinking about, and I hadn't read anything to indicate that it has been done before. But since it's been done with linux, I was curious.
The only real usefulness I can see is if I ever have a drive failure.
By the way, I even removed the harddrive because I wanted to verify that I could boot directly from the USB key without Chameleon running off of the internal drive. It took a little doing, and I half expected a kernel panic... but it's working.
If anyone's interested in the procedure, let me know.