The Open Beta should be started in a couple days. I will try to sign up with that so I can at least try it before it goes final. The game does look pretty cool. I just hope it will run at a decent speed on my computer.
2.0GHz MacBook, 1GB RAM, 80GB HD
450MHz PowerMac G3, 512MB RAM, 15GB HD
I have been playing the beta since the beta started, which has been quite a unique experience. It's amazing how much a game changes over time. Regardless, it plays very well on a Powerbook 1.25Ghz, and you will be very satisfied with Blizzards focus on Mac quality of this game. All patches came out the same time for PC or Mac during the testing.