Since we are building a new house, and this time I've scored myself a rumpus/games room, I thought "Why not build an arcade cabinet?" After suggesting this to my wife I got the "One day... Sure" response, which after careful deciphering definitely means "Yes".

I've been browsing this site for a while now for inspiration and I believe I've found it.
I originally saw ChanceKJ's
Flynn's Arcade cabinet and love the styling and finish of it. I was thinking of going down a similar path, purchasing a new PC to run Mame, but then I stumbled upon Martijn's
Marvel vs Capcom cabinet. I've got a Xenon Xbox 360 that I haven't really used for a while so will definitely be a good candidate to install in the cabinet. After jtagging it, I'll be able to run emulators and also play modern games.
So essentially what I've decided is a combination of the two. A four player slim cab with a nicely laid out CP (mainly for 4 player MAME games, but not 100% sold on this yet), 32" screen, powered by a jtagged Xbox 360, with the ability to switch to external controllers and have video/audio out to the main television (so I don't lose the ability to play the RPGs that I love). Sticks will probably be Seimitsu LS-32, and buttons will be Seimitsu PS-14-GN with clear rings. I want to make them LED lit and the original plan was to do it similar to Chance's where the lights vary on the game selected, but I currently don't know of any way to control LEDs like that from the Xbox 360.
Right now, just currently at the planning stage. Putting together a list of everything I need and working on cabinet designs... So if people have ideas, suggestions, etc, then please post them up.