Hey guys, I've attached a zip file with the plans I used when building my cab. Note that I didn't follow them exactly, and you'll probably want to alter them a bit to suit your needs.
For example I wanted an oversize control panel so two people could stand comfortably side by side for those fighting games, etc. So I altered the plans to make a "shelf" for my control panel to sit on.
Also, these plans are for a 25" monitor. These are hard to come by these days, so you'll probably want to alter the width a bit to fit a 27" monitor.
I bought my controls from Ultimarc:
http://www.ultimarc.com/. Commercial grade build quality, and manufactured specifically for building MAME cabs, very easy to set up. Super fast shipping, the guy who runs the site is great.
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"bond1 - You see this name, you think dirty."