This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Unfortunately we do not cover this topic in the book, mainly because as of the time I wrote it, Spring Web Services did not yet support Spring Security 3. Hopefully I will be able to cover this in a blog article or a 2nd edition of the book
That said, the fundamentals of Spring Security 3 are covered quite well, and would certainly help if you are using Spring Security to wrap homebrew or other web services.
Author, Spring Security 3 (the Book), Packt Publishing, 2010