I think Nokia expects people to carry a phone and an Internet tablet. This is cool. I do this, and it isn't demanding. You forget that PDAs are only used by a small selection of the population compared to mobile phones.

There are some fundamental reasons why Nokia chose not to include PDA functionality. The main one is that they intended to carve out a new niche for themselves upon the release of the 770 -- the Internet tablet niche (I prefer the phrase "Personal Internet Device"). If they'd included PDA stuff then people would have assumed it was a PDA, and thrown it into that camp. People like to categorise things

Secondly, if they'd included PDA functionality, people would have reviewed the tablet as a PDA and marked it down accordingly. Magazines would have paid particular attention to handwriting recognition, for example. Several reviews would have moaned about the lack of a dedicated text entry area, as with Palm devices, or shortcut buttons to the main PDA functions. Other reviews would have compared it to Pocket Windows, which is mature, when OS2005 was immature at the time.

Thirdly, the PDA market is already crowded with some major players (Microsoft and Symbian), and at the time Nokia was developing the 770, Palm was going through hell. Launching a new PDA at that time (and even now) would be commercial suicide.