A buddy of mine was asking me whether he should get an iPhone or BlackBerry or what (he’s coming from an old-school clamshell). I responded with this (which I found kind of amusing after I wrote it).
The iPhone is great if you want an iPod + internet/game device that’s decent for emailing/calling.
The BlackBerry Bold is great if you want an email device that’s decent for internet (I don’t know about calling).
The Google phone (G1) is for people who want to make a statement by not getting an iPhone.
The BlackBerry Pearl is a pretty good phone and decent email device (probably equal or better than iPhone).
Now I’ve only had two of these four devices (iPhone + Pearl), but I think the other descriptions are pretty accurate.