obviously it's not. Otherwise they wouldn't be a total failure for a year now. It's a nice little software but it delivers nothing more than S40 on better hardware. Or samsungs touchiz (the S8000 Jet software, it even had backrounding).
There are no native apps, the upside is that all apps look similar (and nice IMO) but you'll never see fennec or opera mobile, or RaceChrono on it unless they allow native apps. For now it's just a phone that can run silverlight. BTW, maybe we can compile moonlight and run them on the N900 too.