This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Try this one, it has a lot of info.
google concurrency and go through the java.util.concurrent API
better read and practice a lot before you do your real one, because threading can be tricky to start with.