As the N900 release date is eagerly anticipated and there is much debate to it’s release date and possible delay, the good news is when it does eventually become available there will be some apps already in the repository for download.
At the moment of writing there are a total of 9 apps which are compatible with Maemo 5. Most of these are pretty basic but do offer functionality to the platform.
The ever present OMWeather is one on offer, users of older Maemo OS’ will be familiar with. There is also GPodder which is a podcast catcher optimized for the N900 UI. If you’re into podcasts you will need this.