Is it possible to use UiBinder with SmartGWT at all? I've heard that at the moment it's impossible, though there are efforts to bridge the gap. How are those efforts? Have they yielded any successes yet?
Furthermore, if SmartGWT is still not UiBinder-friendly yet, are there any other GWT libraries that might be? ext-GWT, perhaps?
Not with UiBinder, but it is possible with GWT Designer which can be found here. Then simply right click on the project or package in which you want to use SmartGWT, select Google Web Toolkit and then Configure for using SmartGWT. Hope that gets you started!
Edit: GWT-Ext is also included, as you will see when right clicking.