iPhone Opinions
The ability to switch between highspeed WiFi or battery saving EDGE allow you to view YouTube videos, access the built in Map Application (which can now triangulate your location using surrounding cell towers), and utilize the Safari Browser. While load full sites may take some time on EDGE, many popular sites have made iPhone versions to take advantage of the unique touch screen interface and web development kit.
While as a business device handling e-mail and viewing documents may not be fully optimized yet, I highly doubt that your IT department would even configure your mail servers for your iPhone. In the months to come, especially with the SDK launching soon, the iPhone will be drastically improved thanks to third party applications and Apple's desire to stay ahead of the curb with its technology. As it stands right now it offers a little bit of everything for the gadget freak on the go. While your work Blackberry might be more functional for the office, the iPhone is exactly what an individual needs. Don't get me wrong, the iPhone isn't for everyone, but it truly is an exceptional piece of technology that makes your pocket or purse a little lighter due to both the cost and the lack of extra devices you'll be carrying.