The long awaited 1.5 version of the GWT (Google Web Toolkit) has been released. It brings in anticipated Java 5 functionality, as detailed here.
Personally I've found it most useful to be able to define Java generics, which makes life SO much easier when passing objects via RPC!
Also, I love being able to loop over items in Lists, etc, just using for(item : items) { }
I have noticed that the compiler takes significantly longer now but supposedly the run-time is faster. I haven't had a chance to test this yet but one can hope!






