The only thing I've heard bad about the N9 is that you'd better like it as is because there will be no further updates. Other than that, it's pretty sweet. Shame they are going all WP7. Guess that's what happens with an ex-MS guy comes on board.
That's not completly true, as with the N900 the community develops the software furthur and Maemo is still alive and strong.
The possibilities of Meego are great too bad, if they don't develop it further.
Meego trumps Android and iOS like flies, as it's a full fledged Linux Distro.
What that means is it is not a mini OS but instead Meego is Desktop OS streamlined to run on smaller devices.
Peace.
IronSingh