This is just a general suggestion about the website - I'm note sure if there's a better place to put this. In Symfony - following PHPUnit's lead - we removed the documentation's version from the URL and replaced it with "current". For Doctrine (taking the ORM as an example), this would mean that:
We made this change in Symfony-land in response to users complaining - from symfony1 - that googling always returned out-of-date documentation. This makes sense if you have the version in the URL, as all of your backlinks will link to a specific version (e.g. "2.0"), keeping the rank on that version high even as it becomes out-of-date.
Just a suggestion! Should be as easy as a symlink, but do with it what you will.