Found one thing: Expanded the host page w/ 10,000 p tags. Turned on 28.8 throttling and managed to get Showcase's UI injected about 2/3 of the way down the page amongst the p tags. I would've expected it to be the last element.
http://gwt-code-reviews.appspot.com/33808 --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---