I got into MAME a couple of years ago, but just now decided to build a cabinet. Like most of you guys I bought Saint's book and went to town making modifications on the fly. The project took about 2 months to complete. I'm still making software configuration, but my friends and I had our first drunken arcade night and it preformed flawlessly.

I started with a 7 button layout, but then decided to put an 8th button there for my TeamSpeak Talk button. I'm going to build the same cabinet for my father's house so we can talk while we both play games.
Control Panel
IPAC2
U360 x 2
Happ 3" Trackball
Happ Pushbuttons with LEDs
Computer
Core 2 Quad
8 gig RAM
Nvidia GTS 250
2 x Hard drives (One for OS and one for Games)
Windows 7 x64
MAME 1.33 x64
LCDs
Dell 24" LCD
Lilliput 7" touchscreen (left over from my truck PC)
I had so much fun building this cabinet that I'm making plans for a jukebox.
More pictures here:
https://www.pauljuenger.com/PhotoViewer/album633860896306240000/index.xml