Hello, I have done some research on this too. What's new is that you can use the window.name hack w/o any server changes at all, I have described how to do that in [1]. I have also implemented it for my pet project, but there didn't seem to be too much of interest - [2] - so i didn't work too much on making it public ready).
[1] - http://blog.piotrj.org/2009/04/wndowname-hack-taken-step-further-full.html [2] - http://code.google.com/p/google-web-toolkit/issues/detail?id=3722 -- Best Regards Piotr Jaroszyński
-- http://groups.google.com/group/Google-Web-Toolkit-Contributors
