In a somewhat related note, if you haven't seen Francisco Tolmasky's speech at JSCONF 2009 on Cappuccino and Objective J I definitely recommend checking it out.

Video: http://jsconf2009.com/francisco_video.html HN Post: http://news.ycombinator.com/item?id=630290

One I've already seen, but wanted to add to the list so others don't repeat is: Almost.At

Wiki style -- http://collectivesys.com/item/detail/Cappuccino%20RIA%20deve...

please check http://almost.at