Have any of you here played around with MAME?

Its is so cool me and the little one have been playing mortal combat and pac man and galaga and one of my faves battlezone!

They also have emulators for the Sega and the old nintendo on up to the Super Nintendo have played with them also but man MAME is so much fun!!

I am considering actually building a MAME cabinet but I guess that is jumping ahead of the thread LOL