Reuven,
To be honest, I learned that 4.6 had been released because I read about it in #openacs.
Tonight I will update the documents on openacs.org, and try to generate a changelog from the CVS changelog, at least for the kernel and major stuff.
I'd invite package owners to do the same (or something similar, just a bulleted list saying "in this release my package improved in this, this and that" would be enough )and send it to me, so I can add it to our "Changelog" page.
After I have that ready we can post it to other lists (PG, /., and maybe we could finally update our record at freshmeat).
-Roberto