Not my site, but this can be a fun thing to do:
http://www.jammajup.co.uk/You can input your game votes here:
http://www.jammajup.co.uk/retro-game-polls.htmlHe's got some computers there that didn't do well here in the States, so there's a worldwide crossover appeal. Definitely the Atari 7800 and others need more games added!
At first I thought it was crap that there was no way to just click on votes from a list, that you had to write in your favorite games, but it didn't take me long to figure out it was cool and sent in votes on several platforms (besides, with this thing known as the "homebrew scene", he'd have to be updating giant lists a lot, so...). Just for the big ones like the Atari 2600, you might want to come up with a list first in case you don't want to leave any favorites out when sending them in!