Thinking back since my first post, and reading these comments, one thing struck me:
A smart marketer would think something like: "Gee, that iPhone is getting a lot of hype. How can I get some of that magic pixie dust to fall on my product?" And then they'd go off and write a blog post along the lines of "How Exchange 2007 is the best server choice for the iPhone."
A not-so-smart marketer? Well, they'd write something along the lines of the above. And in the process alienate between 500,000 and 700,000 people who just spent $500+ of their own money by telling them what a bad choice they've made.
Oh, and you think those people aren't important because they aren't IT managers or Exchange administrators? Mistake #2.