NOTICE': I will add more data and text after OS X support (tomorrow or the day after)

Installation

Install Java

You can install the latest Java (e.g. apt-get install sun-java6-jdk), however, you will be forced to generate Java 1.4 source code because GWT, currently, does not support versions 5 and 6.

Install JSON support for Perl

Just install the CPAN JSON module and that's it:

$ cpan
install JSON
...

Install Google Web Toolkit

make install_gwt

GWT in action

Voila!

./sbin/gwt-shell