You just gotta love a world in which you can add both Frogger and Asteroids to your website with a simple cut and paste of some html code.
Now if only there were faithful flash versions of Omega Race, Galaga, and maybe a Scott Adams adventure. Jeez, I’d never get anything done! 
I got the code snippets for these games (there are others) from http://www.neave.com/games/