GWT 1.5 RC1 !!!!!!

I'm sure you've seen it elsewhere, but the GWT 1.5 Release Candidate 1 is out. I haven't fired it up yet, but it sounds sweet, sweet, sweet. The biggest change is probably Java 5 support (requires Java 5, actually), including generics, autoboxing, and annotations. There's also compiler improvements, something called JavaScript Overlays (which I don't fully get as of yet), more JRE emulated classes, and some sweetened UI action, including "themes".