About "Old" OS versions, note that nobody is saying they are old (which they are, for the reasons explained). It's their forums which are old and therefore are deprecated under the "Old" category. Any new post in those forums are either relevant to OS2008 / OS2006 (and therefore should be moved) or the answer to the post should just be "You better upgrade your OS".

I do see the difference between "Buy & Sell" and "Deals & Promos". However, how bug and useful is that different not to merge both in one since ultimately the whole thing is about buying and selling.

Moving "Upgrading" to Old would work for me.

About the current alternative OS/distros, I have only stated what is currently available. If you ask me, I would merge all the platform stuff you can run in Maemo compatible hardware under Alternatives since none of them have enough track nowadays for an own discussion forum.

Mer might be the exception, yes. How tied is Mer to Maemo 5? One option would be to have it as a subforum of "Maemo 5 / Fremantle". This would work at least during the Fremantle cycle, good enough to start with. Another option is to have it as a subforum under Alternatives, but specially if they keep being API compatible with Maemo I'd prefer to stress the similarities with Maemo instead of the "alternatives". Another option is to have it at the same level as Maemo 5 and Alternatives, but this might be confusing to many users not familiar with those projects: "is Mer an official Maemo platform or not?"

I will keep the first post updated according to the current conclusions.