If you bought the PM Prepcast package there's module 00.3 you can watch that is about earning PDUs after you pass.
At the top of this page is a link to earn 37 PDU at a cost.
Other free areas is on PMI.org -- They have (almost daily) webinars you can participate in to earn PDUs. Once you sit on them, they can somehow validate you sat on the webinars and credit your PMI account with them. I've sat on a few for learning purposes. I don't think that they count for me as I haven't passed the test yet. For you, I'm sure they will.
First of all I would like to thank you for your advice and materials which helped me to pass the PMP exam. Specially the exam simulator helped me a lot.
I'm kind of eager to receive the confirmation email from PMI about my certification status. Also curious about what are the next steps for earning PDUs. I believe I will be also informed about this. It is now 2 days after the exam and I haven't received any email. I was wondering if there is a period during which I should get the certificate and emails and if this is normal that I haven't received it so far.