They have Linux running on an Ipod, maybe you can get a linux version of MAME running on there.
I believe podcasting is going to become the death of satellite radio....I've already spent just as much on an mp3 player as XM's MyFi, and I don't EVER have to worry about not receiving a signal!
Here's a tip for ya too. Go to Wal-Mart and pick up Belkin's FM transmitter. Now you can listen to it in your car and not have to worry about having wires dangling all over your dash or catching on something. I have earmuffs (hearing protection from loud noises keep me from going deaf in a week

) with a radio in them, and I just tune in the station and throw the mp3 player and transmitter in my pocket. VOILA! No wires to get in my way while I'm working! I bet a cheap pair of radio headphones from Wal-Mart would sound just as good as the lame ear buds they include on all these things too, without the cumbersome wires.
Get me a bluetooth mp3 player and bluetooth headset, and I'm first in line to pick 'em up when they go on sale.