I know a lot of folks don't like Steam (I'm mostly *meh* about it myself), but for those who don't mind having it on thier system...
Steam is currently giving away Portal for free until May 24th.
So, if you don't mind Steam and haven't picked up Portal from the Orange Box or elsewhere, here's your chance.
(I checked it out, and yes it's really free. No hoops to jump through, extra registrations [other than Steam itself], etc)
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