OK, I finally gave this a shot (after getting a new phone, doing some other testing before putting mango on it this morning). This is a on a Verizon HTC Trophy.
I played 3-4 games, RC Pro-AM had an issue when scrolling up the static score/time would roll with the game, so you were driving over it at points. For the most part the games played pretty well (again, only tried a few) and geting about 28-30fps for the most part 99% of the time.
The controls are pretty crude (yea, can't wait till you fix that one), as I found dead spots (rolling my finger back stopped motion) wile playing.
A tip for everyone.... when adding your Zip for your games edit this file...WMAppManifest.xml on the 2nd line, change Genre="apps.normal" to Genre="apps.games" It will show up under Xbox Live under "Other" (a better place for an app for games) instead of with the Apps...
Things I would like to see...
1. Sound ! (have these games stink with out the soundtracks)
2. Controls, better layout for buttons, etc
3. Pretty it up a little, the game screen is only 4:3 as your phone is more of a 16:9, a little graphic (maybe parts of a old NES controler would look cool here with the classic controller/ A and B buttons)
Over all works pretty well, Nice to play the classics on my phone, now I just wish I could move my save games from my PSP (emulated on my PSP) to my phone.
So when you jumpping on SNES for Windows Phone 7 ?