This is just a thread to praise OpenBSD, and give some feedback. I am running OpenBSD-current on Macbook 3,1 (3rd. revision)
I have been using and supporting MacOS X since 10.1. Prior to that, I ran OpenBSD 3.0. My reason for "switching" was simply that of GUI. Now, I'm happy with Xenocara and ports/x11. Hardware-wise (what I really wanted to brag about), I am having far greater stability with OpenBSD than I ever experienced with MacOS. Even with the latest and greatest updates, I have always had problems with OSX seizing up on this machine. I had even suspected bad hardware at one point because I could not track down the specifics of my crashes. However, now that I am running on OpenBSD I can easily show where any crash or freeze was caused by my own experimentation and/or failure to read the directions.