There are actually books for Struts 2. But it won't be out till October. They are available for pre order at amazon. Check the Struts website, they have a 100 page tutorial on Struts 2. It is good actually.
SCJP 1.4, SCWCD 1.4 - Hints for you, Certified Scrum Master
Did a rm -R / to find out that I lost my entire Linux installation!