Digg is great for that unexpected link. This one is a link to all the great NES games, playable in a browser, that I never could afford when I had my own NES. I had some of the classics, Duck Hunt, MegaMan, Sonic the Hedgehog among others, but nintendo8.com, on this page, 100 games from the NES.
The games are not going to be the same as the stand up video games you played at the 7-11 on the way home from school. They are very fun little tidbits of my past, and probably yours, that can fill a few dull moments in your day.