As someone who has been carrying a so called SmartPhone for as long as I can remember (I had Windows Mobile devices from Siemens and HTC since they launched years back) and even a Blackberry or Palm device, I'm not at all surprised at how the New York Times has now labeled the Personal Information Manager based devices a "necessity."
But the Smartphones have gone well past being just a PIM, as they have taken on the life of a being a computer in your pocket, running apps that make you more efficient, are more helpful or just more entertaining.
When you add in a solid VoIP client to the mix, the Smartphone also becomes a money saving and more capable device, almost paying for itself too.
My smartphone of choice? The Nokia E71. Hands down the most attractive, and most useful one I have. For me, while the newer and shinier Nokia E75 has a smaller form factor, the E71 is clearly the only device I have that really rivals the Blackberry as the ultimate Smartphone....for a person on the go.
Yes, Nokia is an agency client to be totally transparent.