The big common problem that I am seeing is the pulsing blue light of death. The thread on the Sony support forums just keeps getting bigger and bigger! And that's JUST the ones that have gone in there and reported it. What is REALLY concerning to me ((and the tall tale sign that this is a larger issue)) Almost all of them are reporting 1.5-2, even 3 hour wait times for customer support. Now, while I do agree that this could be related to multiple problems people are experiencing, I don't think I have EVER had to wait for 2 hours to get tech support.. that's insane! They are also a lot of them reporting long turnaround times.
I don't want to start a console bashing war, but a as a future PS4 consumer this has got me a little curious. Im glad I held off, and hope they get all the bugs worked out by early next year.