Guimp.com, the world's smallest website. Ow, my eyes. And I'm in 800x600, too. I haven't tried playing the games yet, there's no Flash player installed on this computer and it won't install for some reason... I'll try the games when I get home.
Meanwhile: this is a dare to all my friends with high screen res. See how long you last at that site before your eyes start hurting like fuck.

Technically, the website of smallest dimensions - I had this idea it had the least content...
Well, at 1024by768 it was rather tricky to use, seeing as the cursor is almost bigger than the page. Fun, nevertheless!