I caught this off of Iein Valdez's Twitter feed yesterday:
Adrien Ancelin: "For all the GWT-Enthusiasts around here, the official GWT repository now includes a preview version of a very promising 2.0 feature : Ui Binder. I wrote a very simple yet efficient example of UiBinder in action and uploaded a 2.0 build, a little login form example and a small article about it."
Apparently it's a declarative way to lay out GWT applications using one or more XML files instead of programmatically. This should make my life much easier!
Here's more info about the Ui Binder example.