BCD and that too EJB 3 that's a tough one now..... Mikalai Zaikin's notes are good and there are some books too. There is a Head first book for EJB 2.0 but EJB2.0 differs so much from EJB 3.0 that its not preferred for referrals. You can look to get an idea of EJB but not used for preparation of SCBCD5.
[ SCJP 6.0 - 90% ] , JSP, Servlets and Learning EJB.
Try out the programs using a TextEditor. Textpad - Java 6 api
He puts the "turd" in "saturday". Speaking of which, have you smelled this tiny ad?