Few things:

N900 will be (for now ?) the only one device with Maemo 5. It will be expensive (not like some devices with Symbian or Android). It needs some killer features and up to this moment many reviews are speaking about lack of MMS and FM radio, some are speaking about not the best one screen and scratches on camera/covers.

I have downloaded SDK and I wanted to start development. But I can't create software working with Bluetooth (it looks, that real device is required). No SMS API. When you're not in the Finland (Nokia has got jobs in Finland only) or when you don't have connections (you're not journalist, etc.), you can't get device.

Prototypes without killer apps can't make "wow". More devices in developers hands could change situation. Nokia could think about hiring some people from Europe too. It could change situation.

Without it sorry...