A few of our closest friends ...
Media coverage of Struts 2 and WebWork2
Real world usages, How are you using struts 2?
An unofficial list of some likely suspects
Related non-plugin projects like IDE plugins
Unvarnished tidbits from the leading edge
Problem/solutions migrating to Struts 2.1.x
Proposals for future Struts features
Some Chinese document for Struts