I'm going to buy the N900 for the potential of an open platform, not for the built-in features of a pre-release device.
The argument that other N-series devices had the features, so they should be found in the N900, are understandable but not really reasonable. Other N-series devices have used a different operating system, so there's really no common ground.
Maemo is not Symbian. This is the same 'mistake' people make with MMS, portrait mode, T9, etc. The things that were written for Symbian (before Qt) can't just be copypasted into Maemo.