Well I ordered the first parts for my control panel today. Dropped $230, and here's what I got:

Japanese Ball-top Joystick (x2)
White Push Button (x4)
Green Push Button (x2)
Yellow Push Button (x2)
Red Push Button (x2)
Blue Push Button (x2)
1-Player Start Button
2-Player Start Button
Golden Tee 3" Trackball
Keyboard Encoder
Optical Encoder
75 Ft. of Wire / 100 Connectors

Basically I got everything except the spinner, which I'll probably get at a later date. The joysticks have 8 to 4-way actuators on them, which means I can play games like Pac-Man in true 4-way mode, and not sloppy 8-way mode like most sticks. I also found some nice carboard in the garage that will be great for prototyping different layouts with. Hopefully I'll get all this stuff next week and then I can go nuts. Should be fun. :)