I would argue the point, apple is on every phone they produce, ovi store is heavily dependent on your phone model and for most of their low range candy bar phones isn't present.

Problem for the N900 is no one develops to sell, which I think is down to the process of getting things through their approval process and valuing the cost and time against the returns for all that effort.

I am sure symbian apps which are much more common would have a bigger following and more likely turn around.

I still think app stores like android and apple are bigger and have more penetration, mainly due to the fact everyone of the phones of that brand links to the app store from birth, is designed for that app store. OVI store isn't yet complete (still beta) and came after most phones were out, so the interface is a cobbled together mess to suit the differing OS and phone layouts that Nokia insist is a good thing.

Nokia are their own worst enemy and if they can't decide on an OS and a phone layout, how can a developer?