In overall, jQuery and jQuery UI are really great. As for the former, and speaking purely in subjective terms, it’s the best thing that has happened to the web. But with great power comes great responsibility, so this post is about where jQuery UI team is making a mess.
First let’s talk about release cycle – it’s been almost two years since they announced the development of version 1.9, which would come with such a great tools as a menu and tooltip, but still no select-box (although the button element already can serve as a radio/checkbox replacement) . So for me it looks like the development is quite chaotical.