If you've not yet heard, CFML community member Joe Danziger has created a site to cover the ins and outs of integrating CFML and Ajax using the various approaches out there.
Cleverly named, http://www.ajaxcf.com, it could be a good place to keep an eye on if you're interested in the subject, especially if new to it. Everyone has their favorites, but he hopes to cover several, which could be very useful.
His first two major example entries show use of the Prototype.js library. It's not as scary as it sounds. Indeed, by not getting too wrapped up in trying to do a lot on the server side (with CFCs, etc, as some ajax approaches do), it's an approach that many should find easy to understand.
FWIW, I'll add that the examples do work with BlueDragon.
I did offer a couple of comments in his Part 1(http://www.ajaxcf.com/blog/index.cfm/2006/1/27/Easy-Ajax-Part-1) which may be helpful for others doing Ajax integration with CFML (regardless of approach). Finally, I'll note that I put together my own entry late last year pointing out several of the available CFML/Ajax (and generic ajax) libraries and related tools out there: http://bluedragon.blog-city.com/ajaxlibraries.htm. I'll be sure to add a link to Joe's site as a comment there.
This is a cool news, we should keep an eye for future development. This is
promising