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.
For a synchronizedList return value, all individual methods are synchronized. So you can make a single call to add, remove or get and be sure that that add / removal / retrieval is executed atomically. However, it does not make compound statements atomic. Adding two elements after each other is still not an atomic operation, and neither is iterating over it.