I have the N900 since its launch in '09. I love the phone, but it also has its problems. The reason why I am on this forum today.

My phone did allow calling from the web by just pressing the phone# on the browser. As mentioned before it is just copied and pasted into the phone program for you to hit call, which I prefer over direct calling from the web in case of an accident.

Get the N900 if you like member orientated software and OS, but it will come with troubleshooting time to time.

Get the Iphone4 if you want your phone on easystreet, but your limited by Steve Job's unwillingness to play with others. Such as Iphone lost all the cool flash developers.