Talk about marketing. I live in Germany, and here even employees of electronics stores or cellphone stores usually have no clue about what a Nokia 770 is. One guy even told me "those things aren't sold in shops, you are supposed to buy one from the internet". Actually, another shop of the same chain had a 770 for sale.

I think, even though it has a quite straightforward GUI, the device is still too complicated for the average non-tech-person. I mean, hand it over to some unsuspecting subject and tell him (or her?) to set up a bluetooth connection to a cellphone.