is that a PC program like FCUltra, FewwNes, Nesticle etc or dedicated "Handheld" device ? If device , do send the URL
I have revisited my fav games like Contra, Spartan, DeadFox, Ninja Guiden and other whose 'Cassette' I couldn't afford in school days
Man they are great stress buster... we had small group of NES fan at my last company and we used to have Gala time with tournaments as well. The best thing with them, they are not 'addictive' like Unreal, AOM etc, you can back to work when ever you want.