This was a little experiment I ran to see how fast I could reach 100 WPM, while retaining my ability to type QWERTY fluently. I am surprised to see how easy it was to adjust to Colemak from QWERTY, and also to be able to switch back and forth. My progress was logged here:
http://www.ryanheise.com/colemak/
After the first 30 days I decided to slow down a little. By now, my best record is 109 WPM, which you can find at:
http://www.ryanheise.com/typing-test/
BTW, that is a new typing test I recently created which allows you to click on a record to watch a replay. I made it since I wanted users to be able to say which keyboard layout they used so that we can see which keyboard layout is really the best (over time, I hope to see Colemak in the #1 spot ;-)
Oh, and thanks, Shai, for causing my addiction ;-)
My typing record: http://hi-games.net/typing-test/watch?u=1