As noted on Boing Boing, Yahoo! just released its UI Library, an open-source set of AJAX user interface components that developers can use in their sites for free!
From Trees to Sliders, some of these components look quite slick! The real challenge here is not getting them to work with Oracle ApEx, but rather finding practical applications for them. So often I see sites where AJAX is used for the sake of using AJAX, and the result is just a mess.
What intriques me are the reasons behind this. As I've been told many times, there is no such thing as a free anyyhing - it's just a question of when and how you pay. Perhaps Yahoo is trying to steer developers to its services (Maps, Calendar, Mail, etc.) in a pre-emptive strike against Google?
Should be interesting to see how it all plays out.