Any phone with a physical keyboard is just going to be another looser to the iphone. Why is is so hard to understand that those stupid chiclet keyboards for handheld devices are a dead end? Apple got it absolutely right with the all touch screen approach. The only possible improvement would be addition of handwriting recognition, which should be nothing more than a software upgrade.
The only thing that a physical keyboard adds is unwanted thickness and more opportunities for something to break. Apple is exactly right that getting rid of the keyboard to keep the phone thin enough to comfortably fit in ones pockets is the right choice. Having an on-screen touch keyboard instead of a slide out also makes the device much more practical to use for short, casual tasks, which is the whole point of a handheld device. On top of that, all the extra mechanical parts are really just more things to have break.
The problem is that with business users, they just can't use the type of "shorthand" typing you see with SMS cellphone messaging. As such, a real keyboard or its equivalent is mandatory, and that's why the Blackberry or the Palm Treo (and soon Pre) with its REAL keyboard are still so popular. That's why I do see Apple seriously looking at going to an haptic response touchscreen for its next-generation iPhone (which offers much better "feel" when typing out messages and still keeps all the advantages of the iPhone you mentioned) so the iPhone with a "beefed up" Mobile Me service can become a serious competitor against Blackberry and Palm Treo/Pre models.