I'm not sure there's a clear cut distinction between "developer" and "non-developer" topics; there are certainly low-level posts on Tracker and email metadata which are more interesting to developers, but these don't get the ratings that "cool new app released, here's a demo" do.

The biggest suggestion I can make - for someone eager to make a mark on the community - would be to do regular in-depth reviews of applications - specifically focusing on new ones, but any old gems as well.

As for garage news, the "Fresh" feed of apps on newstyle should mean that the garage announcements aren't necessary (and, given they're typically fairly low quality, that's probably a good thing).

In other words, I think it's just a case of someone wanting to write about topics which will be widely read - I think the system as is will promote those appropriately. If someone needs a place to write such articles, maddler's maemopeople.org blog service is available.