Sproutcore had lots of promise, but it seems really to be struggling. Biggest issues (that everyone has known for some time) is the huge learning curve, lack of

Sproutcore had lots of promise, but it seems really to be struggling. Biggest issues (that everyone has known for some time) is the huge learning curve, lack of training materials / docs, and really clunky default ui. I was really sad to see Erich Ocean's book proposal fall flat. Just seems like Sproutcore as a dev community is on its last gasp. I've recently been ramping up on ExtJS and Sencha Touch. Licensing issues aside, Sencha seems to be spending their time on producing good demos, sample apps, videos, and fostering a solid user community behind it. The tech is actually pretty decent as well (though sproutcore had much greater potential I think).