Just a small update on roojs1 - I've added in-line comments to the
RooJs1 documentation - so if you think a method or class is not well explained, add your comment, example code, or bug note right on the documentation. - Something I think makes a huge difference to the usability of code...
Other small changes are also beginning to be added - including the fields property of a Roo.toolbar, and the new Roo.form.Hidden element, to make creating forms with hidden variables simpler.
Anyway, rumors are swirling around that there is a recommendation to avoid ExtJS among certain linux distributors due to uncertainties and general lack of confidence in the license, it's continual changing and general poor behavior by Jack in not understanding the implications of the bait and switch changes.
It also appears that Jack's Legal team are working harder than his coding team again, sending out threatening letters to people involved in various ExtJs2 derivative works. (which is the key reason I'm focusing on v1 - clear, definitive separation and licenses that do not allow for such shenanigans)
While ExtJS2 offered some interesting new features. The significant change to the object rendering model, from my experience has been broken on every release prior to the GPL one, (and since I never tested it after that release, I suspect it's still broken).
Other changes relating to a clearer heirachy of object model look like they should be a simple addition to ExtJS1, along with better support for non DOM element dependent constructors. Hence I think building on ExtJS1 appears to be a better long term move, and sounds like a few more are beginning to see that wisdom.