For anyone else like me who waited until Portal was sold stand-alone style, Circuit City is selling it for $10. Don’t know how long the rebate will last (normally $20), so get it while you can! I got mine today :^) You can buy it online or at the store for this price, fyi.
EDIT:
Dear gollie, what a stupid way to sell games. So you buy the box, but is it the game? No. It’s an installer for ‘Steam’ which, once you create an account, allows you to register Portal and then download it (and why wasn’t the Portal installer on the disc? It would’ve saved some time). Oh, and what a fast rate too at 180 kB/s. Whee. Sigh… why must I download stupid applications I don’t want? All I wanted was Portal… now Steam forever lurks on my taskbar.
Grumph.