Portal is an excellent game. I had heard good things about it, and I wasn't getting my hopes up too much, but I really enjoyed it. It was somewhat short; I played it over a couple days, but it was definitely quality over quantity.
I've found a lot of Portal related stuff around; some of it's pretty cool.
The guys who made the flash version of portal created a map pack based on the flash version for Portal. I've played some of it and it seems good.
Victims of Science made a portal remix as a kind of joke and eventually polished it up and released it. It's called The Device Has Been Modified and if you haven't heard it, download it and listen. It's pretty good, although it won't have a lot of meaning if you haven't played Portal.
I also stumbled on someone's arrangement of Still Alive [pdf] for the piano. It's pretty good, not too difficult. There's a video of it being played. Along the way, I also found official sheet music [pdf] that has the melody, chords, and guitar tabs for Still Alive. And now I've got "Still Alive" stuck in my head.
And lastly, the cake I made for my anniversary / my husband's birthday looks like the one in Portal!
