I've often considered making an stand-up arcade machine with one of the PCs I've got lying around.

I preferred Lucille to Angela, but hey that's me. Some folks like the theater.

fret

http://cincinnati.craigslist.org/vgm/2077414262.html 

THAT does NOT look like fun. The buttons...the look...ridiculous. And I grew up on arcade games. I can't see spending any time on something like that when you can d/l a lot of classic games on current gaming systems (so I've heard, but I haven't done it). I'd love to be able to buy the actual, fullsize, arcade games of my favs.

Most of the stuff was pretty lame, but the price is right.

I think rockbox uses a similar method porting games onto MP3 players.