I was travelling last weekend with the Rockbox'ed Nano. Worked as you would expect, battery life was short, but the only time the music skipped was when I was poking around with some of the plugins. I've encoded at Q6, which is about 192 to 224 kbps.

Rather pleased with it, and will likely have to get the very convient Apple Lanyard Headset because I can't find anyone else making such a combination.

--Nathan