GWT Demos and Samples

I am not sure about you but the best way to learn for me is by example.  Luckily Google Web Toolkit and Google App Engine have plenty of examples to get you going. 

GWT Examples.
These are located in the GWT SDK at this path:
\gwt-2.0.0\samples\
on my machine this translates to this directory:
C:\Program Files\eclipse\plugins\com.google.gwt.eclipse.sdkbundle.2.0.0_2.0.0.v200912062003\gwt-2.0.0\samples

GAE Examples
Similarly located here:
C:\Program Files\eclipse\plugins\com.google.appengine.eclipse.sdkbundle.1.3.0_1.3.0.v200912141120\appengine-java-sdk-1.3.0\demos