If talking about re-org of the forum, what about instead of using Satoshi vs. Alternatives we would
move to categories like Wallets, Libraries and Server?
It is hard sometimes to make clear distinctions - for instance bitcoind is both a server and a wallet and something like BitcoinSpinner is both too (depending on how you look at it).
I don't disagree with you that things would benefit from reorganising, but it would be like herding cats to get everyone to agree on an overall structure. I think the OP has hit on the simplest way of removing the "everything in one thread" frustration that it seems a few people (myself included) feel.
As to when a new client/ library should have its own sub folder, you could easily have a rule such as when the thread hits 10,000 views or a certain number of posts. It is when the thread gets too long is that it becomes unmanagable.