I agree that wiki and documentation could be a bit more readable by reorganizing some pages.
I already talked about moving the documentation completly to the wiki with marciano some time ago, so that everyone can help improving it.
Some drawback would be that the documentation couldn't be added to the source code packages anymore. Only a link to the wiki could be added.
But maybe we can only move the general documentation to the wiki and should keep the autogenerated API documentation within the packages and on the main page. Something I tried with the documentation of the editor, but until now I'm still the only author
Regarding the main page's download links I don't think that it is a must have to move them to the wiki, but FAQ and tutorial are some candidates for the wiki for sure.
Adding a separate related projects page that lists sample projects would be a good idea. We could link the gallery on the main wiki page to that page that would be editable by all forum users.
The biggest problem is that keeping the wiki up to date is something that needs time, and that's something we all have much too less.