For what it is, I would tend to agree with you and I think your points in response to Endri are useful. If the next product is to be better than this product, we should be discussing weaknesses as well as strengths.

What I don't find useful is many of the other posters' attitude of "if you don't like it go away and buy an iPhone." It would be as unhelpful to say "If it's the perfect device for you, you're done; go away and enjoy it."

I haven't found any perfect device. I use my N810 all the time but I wish the OS were different and there is software that is missing or incomplete. I didn't buy the N900 for reasons other than those Endri cited but if the N910 made some changes I might reconsider. Even so, I doubt it will be perfect. Nor will any Nokia phone, regardless of how big the number of it gets. There's always room for improvement.

If you're willing to address complaints (like sophocha did), great. If you are just telling people to go away, take your own advice.