Having had a quick look at the number of devices Nokia does, it seems they don't do any "mass market" devices, they do loads of separate devices for different markets, a different strategy to other players in the field.
As far as the N900 goes, as I said before if there was another choice I would have already bought it. There are loads of devices "similar" to the N900, but none that are in the same device class - I guess that is what makes it so good (for me) and such a emotional topic for all