This cabinet is actually running the Maximus Arcade front end, so it IS a MAME/emulator cabinet.
That would make it illegal , yes? Perhaps it is running something other than MAME?
I actually won one of these last month and it's been sitting in my room for over a week now. I wanted to build my own cab as a summer project but I took a summer class instead so winning this was perfect. Most of the games from Taito, Atari 2600, Namco 25th anni, and Activision are just installed from retail a PC collection cd so it also came with the CD. As for the Midway games they are loaded with MAME which I think was modified, I am not sure since I had a bad crash that wiped everything.
The cabinet is made by GameCabinets Inc
http://www.gamecabinetsinc.com/arcadehits.shtmlIt's actually a nice cab but like Eric said, you can build a much better looking one, but hey it's free (gotta pay for taxes).. still sorta free.

And if you are wondering if I drank any Dew for this, no I didn't, I just used free AMP codes, I perfer Coke anyways.