You don't need rosetta for mame it runs natively now
http://mameosx.sourceforge.net/
Lion has been in beta for about 2 months so everyone could make all the programmes work.
Everything is fine. Come on in, the water's lovely.
Well, look at all the new features and see if you want them.
Mail is *MUCH* improved, the launchpad is cool, iOS like typing correction as you type across everything is super cool, and, as I said, the integration of gestures is just brilliant. I'll never use a mouse again!