By all accounts I can find, Apple has sold roughly a million iPhones since it launched on June 29. That makes a million people setting up the new phones in the US alone, and what is likely a healthy percentage using the Gmail email service.
Personally, I have about six Gmail accounts including those through the Google Apps for your Domain service, and I’ve recommended and installed a number for clients. So, given the popularity of the new phone and the email service it was something of a stun to find just how completely insane the two work — sort of — together.