I’m not using the N900 as a telephone or (business) PDA. I bought it as a personal gadget. It was rather expensive, but frankly, it’s well worth the bucks.
When riding my bike, I always had four toys with me. An audio player capable of playing ogg files and receiving radio (I’m listening to Deutschlandfunk broadcasts quite regularly). The N810 as a personal navigation device (PNA). An external bluetooth GPS receiver (as the GPS chip of the N810 is rather weak). A Canon camera for taking casual (fungi) pics. Four toys you need to take care of.
The N900 provides all features in one device. I’ve not tested yet whether the cam really can replace my Canon A650, but first tests show that it is capable of taking quite impressive pics. I also hope the built-in GPS receiver is good enough to serve me well during biking trips. If so, I can retire the other toys.
I didn’t buy it for mapping only, though. Such a smart phone is a life changer. Always having internet access right at your finger tips, not only at home, makes you completely independent from a stationary computer. Preparing a trip beforehand? No need for it. Just do it in the train or on-site. Staying connected with friends or colleagues? Just fire up your favorite tool and start reading or writing. microB, a Mozilla based browser, really works excellent. It even plays flash content like youtube videos – including full screen support. And of course there are occasions where cellular phone connectivity is useful. The N900 is perfect: It’s a computer, and the phone is »yet another app«.
The user interface is completely different compared to the N810. The touch screen still is resistive but capacitive, and some apps still require work before they are »finger friendly«. But though it’s not yet as good as the iPhone’s interface, it’s really simple and intuitive to use. Nokia did a good job.