Guava libraries are powerful, but I’m not sure what all the possibilities of this library are.
I’ve found interesting tutorials like http://scaramoche.blogspot.com/sea
Guava has added a new resource: Guava Explained: https://github.com/google/guava/wiki
I uploaded simple unit tests using Guava to github. Most of them are from Guava Explained. But some tests are solutions to problems in my workplace. Adding/modifying tests to the repo is always welcomed.
https://github.com/philipjkim/guava-example
The API documentation is your best bet, along with the PDF slides linked at the guava homepage.
It's worth to also check this one: http://tomaszdziurko.pl/2012/02/google-guava/