I've started a MAME project that I think is unusual.  I own an old Victorian style house and a normal arcade cabinet would look odd here.  So I'm going to build a roll-top desk MAME cabinet.
I'm starting with these plans 
http://store.yahoo.com/plansnow/rolltop.html and modifying from there.  The desktop surface will be the control panel.  It'll be on pull-out slides designed to look like a drawer to give your arms a little room when playing (I don't want to knock my knuckles on the desk sides while thrashing about during play. Below the control panel will be a second drawer that houses a keyboard.  All of this will raise the height of the desk up.  I'm planning on counter-top height so you can play on a bar stool or standing up.
The monitor and PC go inside the desk at the back.  I'll modify the depth to hold the monitor.
A shelf at the bottom will add stability (since the slidable desktop won't.
I've already put together a prototype 2-person control panel and bought a bare-bones Athlon 2400 system.  Oh yes, then there's the full set of ROMs.
Comments?  Any suggestions for a decent free CAD program to help with the drawings??
Dave
PS How the @!&*()!@ to you insert a decent url in these messages.  I have a link above to the plans, but I wanted you to be able to click the words 'these plans" and have it take you to the link.  I tried the url button on the "Add YABBC tags" section while composing the message.  That inserted url .. /url in the message... at the bottom of the message, not where the cursor was located.  I can't figure out what to do from there.
Is this one of those "it works fine with IE" things? I'm using Mozilla 1.5