And yet, I use the N900 for business and have absolutely nothing to complain about! The business functions are more than sufficient. The address book is much broader than it might seem at first glance. Thanks to various plugins, it is possible the most diverse messengers like ICQ, MSN, Yahoo, etc to integrate. So you click on the desired contact and sees the status he has in MSN and ICQ. Another click and you chat with him in the desired protocol.
The operating system is based on Linux and is freely modifiable demensprechend. Because it is Linux, you can Sogut like all the programs on a normal Linux also run on this device port. (For example, you can already install Starcraft, different shooters like Quake or OpenOffice it.) That's the big advantage is! The developer does not sit namely in offices of Nokia, but all over the world. You can contact with the developers, exchange ideas and make suggestions. Therefore one must be a "Linux freak". It is enough if one seeks out the right places, such as the Maemoforum. Every day new programs are presented or asked for solutions.
Thanks to the recent update the released and many bugs have been fixed and, inter alia, the Potrait mode the browser is available or if the battery now lasts longer.
It's the best device I've ever had in his hands. It is no longer a phone, but a small computer.
Conclusion: Anyone for a "mobile" spends 600 euros, should also inform in advance what it can. And it can damn much. You have to know how to use it only.