Want to cheat on your PSP, PS2 or PS3 go to PSX Extreme the most useful cheats would probably be the Sims 2 because it's sooo boring at the beginning. Photo from the Gamespot forms.
Fun-motion.com is a blog devoted to physics games. It's a little Windows-heavy, but there are some great Flash games there too. Shown here: Raptor Safari (requires Unity Player 3D Plug-in.)
This one is another Monty Python classic (and number 3 on their list): The Argument Clinic. (I also love the classic four Yorkshiremen skit, which only came it at number 32). Via BoingBoing
I enjoy this Fern Fractal Creator (as well as other Flash tools from the same site). A fractal is shape that can be broken down into parts which are copies of the whole, in the way that the branches of a tree are like little trees. They are cool.
There are lots of Mario Fusion videos. The newest one is 50% done Megaman Power-up. I like the Stages Speed Run and 5 levelsthought. Why this may sound so weird is because it's a superbly well made Mario Fan game. It looks between Great and Amazing. Get it here (0.0.0.2 beta). Coming along well but slow. Photo here.
Wow! You must check out this game: Moonshadow on Miniclip. Maybe very close to the best Flash game on Miniclip so far and I've just played it for 15 minutes.