i think that is the pb is that the iphone need alot of unlock and jailbreak to deal with in the 1st place that is why u will see more ppl in a iphone forum more than any other phone . and the iphone did not have to begin with .... so they really needed to jailbreak it .
and i think most off n900 users just have the app manger and they can download anything they are looking for .... and some of them are just w8ing for the ovi store to be more in use .