They are smart too because, instead of trying to compete with other popular AJAX libraries, they integrated with them (Dojo, MochiKit, and Prototype with Rico so far).
Last but not least, Aptana is building an Eclipse-based IDE for AJAX webapps in general and AFLAX in particular. Checkout some Aptana IDE screencasts. Cool.
A Question for the AFLAX team: what's with stack overflows in demos? They seem to occur during page transition.