I'll have to add a shameless plug to the visual HTML5 editor in the browser that I've built. Also created with GWT, and using GreenSock JS for animations.
tweenui is very slick, I was playing with it some time ago, very well done! I like how you did ad campaigns, variations that kind of stuff. we don't have it at the moment, but do have much more advanced drawing/animation.
As long as we're doing shameless plugs: checkout my cross-platform product at http://tweenui.com/animator – it's for creating simple HTML5 animations (focus is mobile display ads) in the browser. You can download the result or publish to the cloud.
Wow, that product page is just massive. It tires me so much just looking at it that I'd rather just browse along. I'd like to see what designers looking to build up their portfolio could do with the Amazon AWS products.
I think the problem may be your lack of interest. As somebody who has used AWS a fair bit, I love those massive pages. It's easy for me to jump around, and being able to use in-browser search to rummage through the whole thing is great.