Hi,
just to let you know I succesfully deployed a JSF 1.1 app on Google App, when I have more time I will try to deploy JSF 1.2 + RichFaces, here there is the article with the steps to do that:

http://blog.demetrio.it/2009/03/10/deploying-a-jsf-11-app-on-google-app/

and here the online demo:

http://2.latest.demetrio81280.appspot.com/pages/inputUserName.jsf

Demetrio