After a few of days of researching, I've decided to learn Colemak, starting tonight. I was contemplating learning Dvorak, but have read so many positive experiences on the forums here, as well as the reasons stated in the FAQ which seem very logical to me, have convinced me to try Colemak instead. I also really like the fact that AutoHotKey can be used to temporarily switch the layouts on the desktop at home, which will mean less confrontation with my wife over forgetting to switch the regional settings back :) So far I've successfully installed it (Autohotkey as above) on WinXP and my Macbook Pro, although I have not remapped the caps-lock yet. Here's where I'm coming from in terms of typing skills:
Qwerty
~75 WPM and 93% accuracy (based on TypingTest.com)
I'm excited to see how this goes.
Grant