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I'm a few days late on this (blame a quick trip to Atlanta at the end of last week), but Adobe has released Tour de ColdFusion. This is an AIR based application which gives you examples of all ColdFusion tags and functions. You get both sample code and output as well. It is very much a work in progress (hey, that's what the Beta is for!), but you are encouraged to download it and try it out. Feedback can be given on the public Google group. I helped out a bit on this project (mainly review, although I wrote some of the samples a bit) and I think it is off to a great start. Being able to actually see the result of a feature I think makes a big difference.