A Linux enthusiast and you don't know about Pandora?
The pandora is an open source gaming handheld. Which means, legacy arcade emulation, nethack on the go, old console emulation... Plus with a bit of hackery you might be able to use it as a smartphone with google voice. And a mobile media playback device.
I'd buy one if it wasn't so obscenely expensive. As it is, I'm fine with a hacked PSP.