A: 

I suggest that you ask the folks at one of the various Java newsgroups. The JavaRanch site (http://www.javaranch.com) is particularly helpful, and so are the good folks on the ORO and Regexp newsgroups. Also, Apress now provides forums (http://forums.apress.com) where readers can interact directly with authors. When you ask your question, make sure you provide sample input, expected output, and your current code.

A: 

The single best regex book I can think of is Jeffery E. F. Friedl's Mastering Regular Expressions (O'Reilly & Associates, 2002). It's an elegant introduction to regex, and it deals with how several languages, including Java, use regex. It doesn't focus on Java regex with the detail that this book does, but it does provide an excellent, entertaining, and detailed account of regex mechanics, theory, and application. If you're looking for a book that will expand your general understanding of regex, you should seriously consider purchasing Mastering Regular Expressions.

A: 

Well, yes and no. I won't address private e-mail messages, but you're likely to find me lurking on the JavaRanch site (http://www.javaranch.com) and the Apress forums (http://forums.apress.com). If your questions are posted so that the general public can take advantage of the discussion, then I'll try and provide whatever help I can.