Luigi, packages in black mean that the package exists but there is no documentation available in the PACKAGE/www/doc
directory (well, more accurately, no index page there, but if there are docs but no index page we should create one).
With respect to forums, no documentation, apart from comments
in the code, has been written. I know Ben Adida has been filling in some gaps in the API documentation but I don't
know if he is planning on writing any higher level documentation or not (or if someone else will take that on).
You aren't doing anything wrong, it's just that there are
some conspicous gaps in the existing documentation.
