Peer pressure dictates that I play along too.
I modded this thing over two years ago, before anyone cared. Sanwa parts (which I actually got direct from Japan, big hassle), wired to a 15-pin DSUB. Really shoddy job, took more grinding and stupidity than I ever thought. 35mm balltop is too big for me, so I used a 30mm. Octagonal gate because, I dunno, I like it better sometimes. I'd open it up and show you, but... it's not going to win any awards, unlike buttasuperb's amazing nylon-sleeved fancy wiring.
Runs on Neo-Geo, PS1/2 (with a not-pictured adapter I will probably never use again), Dreamcast (adapter not pictured, again)-
-and now 360, thanks to the brand-new adapter I made last month from a single-common Gamestop pad. And, of course, the adapter converts old Neo-Geo sticks as well, which will be fun for KOFXII when it lands. The craftmanship on this is much, much better.
Sad thing is, I don't even have any fighting games for 360 yet. Tried SFIV at a friend's house, though.