I think the physical keyboard is certainly a n900 advantage from many other phone where you need to use the screen keyboard all the time... i got my missus a cheap android and the 3 things i cannot get use to are:
- screen keyboard
- application cannot be terminated and closed down
- and many apps seem to try to get your geolocation from your wifi when they could simply get it from the built-in gps or a-gps signal, this is serious google really needs to stop building this kind of personal information.

resuming, i kind of like android but would not buy one for myself for the main reasons above

Iphone's i like the clean look of them, the amount of apps and there seem to be lot of iphone jailbreaking going on (e.g. people running other os's, etc) but PAPA jobs gives me the impression that he wants to dominate the world with his fashion expensive gadgets by dictating what we can install/run or share with others, on devices that we consumers have payed for with our hard working money and for that reason alone PAPA jobs will never see my money, or my recommendation to others or for that matter my respect.
e.g. wanted to share something with the friend and the iphone would not allow us to blue-tooth the stuff across, what a pile of crap PAPA jobs devices are
PAPA jobs also seems to try to dictate what developers can do with their apps, and as we seen in recent times he catches that headlines to twists the facts and brainwash a few more consumers... just unbelievable.

About the N900, is just a personal mobile computer that you can carry in your pocket, which at times can be a pain in the back side, it also lacks some of the cool mobile apps or features on other hardware out there but offers lots of emulators and everything seems very much to be free. There seem to be a lot of ongoing projects that could potentially open up the N900 to be able to use other cool apps.