Puzzmo offers a collection of casual puzzle games from the traditional crossword, a fresh take on sudoku, or a clever incarnation of poker. It offers leader boards and groups to challenge friends.

No, it’s not The Onion. A Whac-a-mole movie is in development.
A fun way to explore Wikipedia: The Wiki Game. Click article links to navigate from one article to another. It’s timed and scored like golf.
Fade is an addicting Flash game, where you guide a llama, hurdling over cliffs and shrubbery as it picks up speed to see the world in perfect color. See, the game starts in black and white, and as the llama picks up speed, somewhere around 35mph, the world begins to turn to color. You earn points for distance traveled to spend on skill power ups to go even farther. Also, there are achievements, if you need that sort of thing to validate your gaming experience.
I guess I’m a little late to this, but Graph Racers is a pretty nifty concept. Take some graph paper, make a course, get at least 2 players, each with their own colored marker and have them race around the graph paper track.