I am making the switch to Colemak from QWERTY. I set up one of my computers on Dvorak but it didn't appeal to me that the familiar keyboard shortcuts were all over the place, and I couldn't close a tab with one hand, or similar. I average 90-110 WPM on QWERTY, and have been typing it for 5-7 years. My goal is to get over 30 WPM in the first week of Colemak. I am going to be using the KTouch tutor.
Just finished setting up some shortcuts, Control+Alt+C to switch to Colemak, Control+Alt+Q for QWERTY, and now I'm going to start training.