Im an idea guy, I can often times think up or design several cool enhancements to current the designs of things.
Im in the process of building my first CP and in that process I have come across a few ideas that I have not seen used yet by anybody so I just wanted to share them and see what everybody thought, so looking for feedback and feel free to use any of my ideas.
The V.S. Arcade Cabinet First is my cabinet design, my friend likes this one and is actually going to use it.
The idea is that with LCDs these days being so thin & light to create a competitive double side arcade cabinet. It will be symmetrically split in the middle with a screen on each side in opposite sides with controls for one player on each side.
This way you have all your own space and elbow room, you dont have to worry about if the other guy smells, and the main reason I thought of this is because I used to hate when people would look at my hands to see what I am doing. This gives you privacy when you play. It would give that cool feeling of playing a live opponent over the internet or something except you can hear there screams of agony in person after you beat them for the 100th time in a row.
Easy Modular ConnectionsI came up with this idea since I am a computer builder and my CP is going to have to be able to interface with multiple systems. For now I am going for PC & Dreamcast. I wanted an easy no hassles way of having it modular without soldering and stuff. My solution that I am going to try is a normal computer ATX power supply extender:

Just cut it in half and your done, you have wires you an strip and tie directly to your other wires, or better yet insert them into a terminal block. The connection is secure and solder free and relatively cheap.
Variable Control Panel TiltThere was a thread I just answered here on the forums yesterday where somebody was asking opinions. "Whats better a flat control panel or one with a tilt?" My answer was... Why not both?? More than once watching mythbusters on tv I have seen them use hydraulic pistons to mechanically move stuff remotely. You could use something like this or many other things and have the CP on a axis or hinge system so that it could easily be adjusted from 45-90 degrees at any time on the fly.
Optical Control PanelThis first project of mine is super budget, and I have no space in my house with 4 kids to keep a CP setup or build an arcade. So I am modding my computer desk into the CP, To make it look more official and to cover my holes if I have to end up top mounting the joysticks I knew I needed an overlay of sorts.
I decided the best/easiest way to do this was with a adhesive vinyl print, It was hard to find a place to do this in the size I needed and anybody that did it custom wanted WAY to much money. I got lucky and finally found a link from here in another thread to mamemarquees. There prices are not too bad but what I found interesting is they have different stuff, the Vinyl was more expensive than the marquee and the marquee being a nice plastic material seems like it would hold up as a CP just fine, even if the marque product is not supposed to be suitable for a overlay under a piece of lexan or plexi I see no reason it wont work.
I thought to myself what a waist though, it.. could light up for a great effect as thats what it is designed to do. So thats when I figured hey why not just cut my entire wood CP out except for the frame and put a nice piece of plexi in there, mount all the controls to the plexi and put the marquee under it and then wire some lighting up. Forget light up buttons... how about an entire light up control panel???
Here is the 30 minute mock up of my control panel design.

What I am going to do is install the stuff into the panel, take a picture of it, and then in photoshop overlay the CP with this design and move things as needed, stuff like the blue circles are supposed to be centered on the joystick. I designed this with the idea of vinyl I did not even have the clear CP w/ lights idea yet. However this design seems almost already absolutely perfect for that idea, the black should block out the light mostly or completely and the red/blue will light up like fiber optics.
Easier Gamepad Hack?This one I have no idea about, its just as much of a question as it is an idea. I was thinking we should check out the game adapters sold by x-arcade for there joystick to be used with consoles. It maybe easier to hack one of those instead of a gamepad. They are like $20 so its cheaper than a $30 controller and you already have an interface point and a project box. I just have to be willing to drop $20 + ship one day to break one open to see how it works and if we can use it for this purpose.