My friend Rune made the switch close to 10 years ago. I’m slightly annoyed it took me this long. OS X is beautiful. Virtue, *nix, widges, Bonjour, Spotlight and Exposé. Not much to say, really, you just have to try it. I maxed out the memory (2GB, not via AppleStore), and I’m glad I did. She really does fly away! (I might be slightly biased, having lived with a 0.25GB Sony Vaio the last 6 years…)