1) Are you planning to take your exam BEFORE July 31st 2013: Start immediately with the current PrepCast. (But you don't have a lot of time, so this may mean "rushing" things).
2) Are you planning to take your exam AFTER July 31st 2013: Wait.
I assume that your answer is going to be "2" - so you can wait. The updated PrepCast will soon arrive. We will make an announcement toward the end of the week about the availability and official launch date.
I am planing for PMP certification, but one question bothering me is should I wait till PMBOK 5 prep cast or should I start with PMBOK 4 prep cast?
I have over 5 Years of Project management experience but I don't have required PDUs to start my application process so,
Should I start with current prepcast and get the required PDUs and start the application process? or
Should I wait till PMBOK prep cast is available?
I am still in planing phase of how to prepare for PMP.