That doesn't really solve much. If we have say:

Software/Applications
-Maemo 5
-Maemo 4
-Old Crap

And I write a piece of software that works with both Maemo 5 and Maemo 4 but not Old Crap, I still have to make separate posts within the categories for them. I can't just put the application in "Software/Applications" because that would also imply support for "Old Crap".

The reason I choose the OS route is because even though one application will support multiple operating systems.. the problems and bugs related to the applications will vary greatly based on the Operating System they are running on. Two people running Maemo 5 will have a much greater chance of having similar problems than Two people running Maemo 5 and Maemo 4, for example.

However, due to the fact that any application could support any combination of operating system, library, hardware, etc.. is one of the hurdles of this type of discussion. In such a multi-dimensional area there will never be a 100% perfect solution.

Your solution does have Merit, of course, and though I don't think it solves the problem you've specifically mentioned - others may prefer it like you. Draft up a good layout of your vision and make a Solution at the Brainstorm for it.. at this point that's what we've got.

As far as a process to speed all this up for the N8x0 guys (which I guess technically includes me) - I have no idea how we're to do that.

ETA: Your solution is very similar to Solution #2, just in his solution he's using Tags - instead of categories. So you could vote his up instead of creating your own, if you prefer.