embedded linux questions, arcade and desktop
Okay i have some questions regarding embedded linux:
I plan on building myself a MAME arcade unit/ jukebox. I've been reading about embedded systems on different sites, and i was wondering if this would be practical. All i would need it to do basically is boot to a little front end where i could select arcade or juke box, and then run mame and xmms (or another media player i'll worry about that later), and i need it to run grip, so i can rip my cds, and would need it to go to a console. Is it practical for me to make it an embedded system (it'll probably be an old pentium system).
Also, what about an embedded desktop. I don't have any plans to do this, but i'm just kind of curious. Would it be possible to take a desktop pc and make it into an embedded system, with pretty well all the functionallity of a desktop (i mean like surfing the net, playing games like ut2003, using the gimp and open office, and installing new software) Would it be possible to do this to a desktop pc to give it that instant response of an embedded system.
So if anyone could answer my questions, or maybe clarify, my no doubt muddled idea of what an embedded system is, maybe point me to some resources, i'd really appreciate it.