since alex mentioned almost.at, i'm going to go with qooxdoo - which (codewise) is a whole lot more direct.<p><a href="http://qooxdoo.org/about" rel="nofollow">http://qooxdoo.org/about</a><p>Still waiting on Atlas to appear though.
<a href="http://almost.at/" rel="nofollow">http://almost.at/</a> is very slick<p>I tried to do a similarly pretty UI with my Ajax app - <a href="http://gambolio.com/#/library/" rel="nofollow">http://gambolio.com/#/library/</a>