Maybe it's because the forum has a bit of a strange setup, it acts like there are a lot of devices running maemo.

While in fact there is only 1 ONE 1 device that's actually usefull as a mobile device.
And since it's also the first device that's actually accessible for people like me who pay about €0,01 for the device instead of €600,00, maybe it's likely to attract a lot of new users.

And because the NOKIA discussion board isn't as easy to find as this 'Talk' site, I think the N900 is getting a lot of non maemo related attention.

Maybe just one topic for a device is not sufficient?