Nice work! I'm very impressed that you hooked up lighted buttons with "near-zero electrical skills" - I wouldn't even know where to begin. You should definitely be proud! 
Thank god for the LED sets from GroovyGameGear - LEDs with wiring included. I did learn to strip and crimp wire, glad I didn't have to solder...
nice. the cab has a very 'comfortable' shape to it. looks like it would play really well. did you design it? what are its basic bits? monitor, pc etc?
I designed it in SketchUp, which I was impressed with. You can see the original design here:
http://crummynz.shackspace.com/pics/cabinet2/02_cabplans.pngThe PC is a $300 HP refurb I got from Fry's. Pentium D 950 or something similar... 2gb RAM. I did put in an ATI X1950XT videocard, which I wanted for the component out.
For the TV all I wanted was component and a decent size. Got a 27" off Craigslist. Looks a bit fuzzy but works great in game.