Since I'm getting ready to purchase, thought I might get some good tips before I go on my "hunt". I want to be able to walk in to an Apple Store and purchase the iPhone, but I was wondering, for those in the San Diego area who have recently bought an iPhone 4, how easy/hard is it to find it right now? Are they basically still selling out as soon as they get shipments in, or do they have some type of waitlist that they make you go on?