Example in here(Finland)it will most probally be mass market seeing the reception it have had and it being even on the main media. It might come something that N95 was(it will if ít had gathered as much preorders from other stores as verkkokauppa.com).

Globally i think N900 will gather rather big part of the high end Samsung and Nokia buyers(plus some who have left Symbian after 5th edition), but it's not a phone that will lure new people from mid end.

If Nokia would really market N900 it could become rather big for Nokia imo, but Maemo 5 and N900 isn't yet the right time to go all out.