Well I don't know how many people have really used more than one option. I voted Huey Pro because that's what I bought and it works well for me. Other options may be better (I've heard that the Huey Pro has problems with some of the Macbook screens) but I haven't used any of the other ones.
Looking for some feedback on calibration. Would you mind voting for what you used that you were PLEASED with? Any products that didn't work for you, put into comments below.
The Eye One Display 2 seems to work well. I can't say that it's better or worse than any other solution, but I can tell you that my experience is that it works quickly and easily on my ACD.