dojo, impending!
This week, Dojo will be releasing our first full public version, 0.1. It's not "fully baked" in a lot of ways, many things will change as we go into 0.2, and we already have a ton of things slated for past that, but 0.1 will be the best DHTML toolkit I've ever helped to build.
We've already started documenting some of the major parts of the system, and we'll continue that after 0.1 flys the coop. There's some really amazing stuff in there...can you say stable, lightweight, cross-platform WYSIWYG?