If so check out this website.
http://www.retrouprising.com/
It's free for everything. Signing up allows you to use save states and set high scores.
They have a huge selection of games and are updating frequently.
Systems currently on the site- Snes, NES, Genesis, SMS, Game boy/Color/Advance, Game gear,Coin Op, ColecoVision, Flash, Turbo Graphics 16 and Text based.
Bottom Line - It's free, why not try it out?
Thanks for reading. This isn't spam or a scam of any kind. I don't get anything for refering people.
Edit- There's also an active forum.
Edited, May 29th 2008 2:21pm by Dudebro
Edited, Apr 7th 2009 10:36pm by Dudebro
Edited, Apr 7th 2009 10:37pm by Dudebro