Lots of Struts articles and books swirling around the blogs and sites and bookstores and etc. OnJava has two articles: 1)
Lessons from the Trenches by Chuck Cavaness author of O'Reilly's
Programming Jakarta Struts and 2)
Learning the New Struts 1.1, Part One by Sue Speilman author of
The Struts Framework. The Server Side recently posted
The Fast Track to Struts (PDF). And finally, looking at Powells I see that
Goodwill,
Husted, and
Turner all have Struts books coming out as well. I haven't read any of them yet so please read them for me and tell me which ones are best.