eWeek has a good summary in their article "Analysts: iPhone Has Neither Security nor Relevance" with a number of links to other resources of the likely security problems introduced by (of not in - we'll see) the iPhone. Certainly the iPhone is not the only device where we have to worry about these types of problems, but let's face it: iPods and other mass storage devices are already too loosely allowed at many companies and organizations, and the hype surrounding the iPhone and the potential excitement of iPod owners can cloud judgement. Read Andrew Storm's article on the topic.

In contrast, Blackberry's enterprise services are well-secured and provide a whole slew of workable and effective controls that the iPhone can't even begin to match up with. In a nutshell, the iPhone is a consumer device that probably doesn't belong in the enterprise - at least not in it's first version. Gartner plans to recommend businesses keep the iPhone out of the enterprise.

Also - sounds like typing on the on-screen keyboard is an index-finger exercise, not for thumb typers. So again, not so much an enterprise device. But we'll see all this stuff for ourselves in just a few days. The iPhone debuts on June 29th.

Note: I think the iPhone is a cool looking device and probably a great consumer item. I'm not knocking the device for consumers, just pointing out it's not appropriate for use in the enterprise. So before anyone starts with "iPhone/Apple-Hater" rhetoric, you can just stop. :)