Craig McClanahan, the original creator of the Struts Framework and the co-specification lead for JavaServer Faces 1.0 (JSF) has wrotten a very interesting entry in his weblog about Struts and JSF integration, with some comments about Spring and JSF.
Definitively JSF is on the top of my list of TODO tasks.
Carlos Sanchez's Weblog 
Thanks. I’ve been waiting for an update on the Struts/JSF integration.
I wouldn’t recommend using struts and jsf. JSF by itself or JSF+Spring are much better.
I have some thoughts on this topic (linked).
Regarding the last comment,
At this point in time, I reserve the right to change my mind, I would only use JSF and Struts if I was adding JSF to an existing Struts project.
I don’t feel the jsf-struts-integration lib provides enough value to tie your JSF code based to Struts. I need to reevaluate the integration lib.
I use JSF and Spring together, but the spring integration with JSF was not done yet. I will try it again on my next project.
I wish I have some spare time to take a closer look 😦