@pelago: yes, anyone with a wiki account should be able to update the documentation. However, when the documentation is applied to an application, there should be some approval process for updates to that documentation (contributor > developer > published) so that items aren't updated mistakenly.

The other part within this is that it should make for another in-road for people to contribute to Maemo projects in a more direct manner. This would essentially be an open invitation from the developer to the community at large. Though I would caution that this could easily be something that a small org/company takes up as their approach to selling support services to open source developers. So caution would need to be applied here.