What I've Done:

I bought a Donkey Kong marquee from Jim Ranlett *thanks Jim :)* and replaced the Sky Shark marquee with it. The cabinet looks better already! :)
I bought a new sheet-metal lock and replaced the old nasty lock/bar mess on the coin door.
I bought a Donkey Kong control panel from Art *thanks Art :)* and am in the process of replacing the Sky Shark control panel with it.
I have started scraping off tons of the nasty old paint. About %40 done.
I puttied up some gouges in the woodwork and filled in the three holes made by whoever installed the extra lock crap. *growl*
I bought the Nintendo white T molding.
I found the formula, mixed, and bought some replacement paint.
I wired up the Donkey Kong control panel to the JAMMA harness so I can use it again!
I replaced the 4-way original joystick with an 8-way joystick so I can still play JAMMA games with it.
I got an AWESOME monitor bezel. Thanks JD!
I got a Donkey Kong PCB with the wrong ROMs.
I got an extra coin door and coin mechs.
I ripped off the old coin door.
I removed the old style bulb fixture in the header.
I installed a new flourescent light. BOY, that helps! :) It's so much brighter, I decided to do the same thing for all my games.

Left To Do:

Finish scraping off the nasty old paint and touch up any areas that need it.
After I re-finish the sides I need to install the white T molding.
Get two copies of Donkey Kong side art or a set of reproductions.
Get a video-inverting switch or something so I can play both Donkey Kong and vertical JAMMA games.
Replace the little coin-return coin-holder thingie on the coin door.
I need to re-burn the ROMs on the Donkey Kong PCB.
I need to replace the coin door with the new one I bought.
I need to install the nicer coin mechs.