Amazon has a pretty kick-ass pre-order deal for Valve's highly anticipated April 19th release, Portal 2, right now. If you place an order now you'll get the game plus a $20 Amazon credit, all for the price of $54.99. That's $5 of the list price, plus free spending money!
The deal is good for PS3, PC and Xbox 360, but it seems they're having trouble with the PS3 pre-orders. Amazon's Twitter says that they're working to get it fixed now.
Go to Amazon to place your order now.
[Amazing header image of a corgi in Portal from A Corgi is My Co-Pilot]