I think you guys may have misunderstood what I was saying a bit. My main bone of contention was that I got the impression that Colemak was being somewhat over-hyped in some quarters. In particular, when I saw it described (somewhere on Wikipedia IIRC but I think I noticed this on someone's blog as well) as the "million dollar keyboard" having won the CapsOff competition, that seemed pretty impressive at first, but on closer inspection it turns out that the CapsOff prize fell waaaaaay short of the purported million dollars. (There is no indication whatsoever on the CapsOff site as to how much was raised in the end, though there is a promise there that all donations would be listed.) Personally I thought this was a bit dishonest, and I think that must have made me a bit sceptical of Colemak's other claims.
Having said that, I did spend a couple of weeks or so trying Colemak properly about a month ago. I was impressed with how easy it was to learn it in the end, and I can say that both Dvorak and Colemak make a huge difference on the Kinesis keyboard, on which I found qwerty almost unusable. However, I didn't find any benefit from either of them on my flat laptop keyboard -- in fact I actually find qwerty more comfortable on more conventional keyboards. At the moment I'm back to qwerty on a Microsoft Natural 4000, and I clocked in at about 80 words per minute on Ryan Heise's typing test with it the other day.
So if you think I'm frustrated, you're quite right: I've spent a lot of time checking out both Dvorak and Colemak, and a lot of money on a Kinesis keyboard, and in the end of the day, I had to admit that they had all failed to demonstrate any noticeable benefit in terms of either speed or comfort over qwerty on a Microsoft Natural Keyboard. But that's just my personal experience. Some of you do claim to notice an improvement in the end, and it wouldn't surprise me if you're right. However, all I can say from my own experience is that Your Mileage May Vary.
Sorry to disappoint...