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.
You might also like to take a look at the two introductory articles I wrote for the JavaRanch Journal on the java.util.regex package. The articles appeared in the September 2002 and April 2003 editions.