While my Portal on Mac experience was a little off the on the night of launch, I quickly found a work around on the Steam forums. I guess there's a problem with Portal and my version of the Mac OS X software.
Having squared that away, I thought I'd post this little ditty and remind everyone that Portal is free for Windows and Mac users until the 24th (?) of this month. There's absolutely no reason anyone shouldn't at least download the Steam software and get in on that free-Portal-goodness. Even if I didn't have a system that could run the game, I think I'd still hop on and make sure I got the game for free in case of an impending upgrade to my hardware.
The video embedded above is a great example of why I love Valve. Check it out for yourself and then go download Portal for God's sake! (That means you Jenna!)