This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Yes you can have more resources of a class. Just like defining more @EJB's on a class is done with @EJBs, multiple resource can be declared bij using @Resources, for example (from: Oracle EE5 tutorial):