The just posted the most recent update for Revit 2012 products. It is necessary to install it to use the also recently released Autodesk Cloud.
Download the RAC 2012 Update Now
Download the RST 2012 Update Now
RME 2012 is a little further behind at the moment...Click here to visit the page where it will appear.
A couple people have posted about Downloading MEP directly (English) now. I don't know if the URL will hold though. The links above take you to the page where you choose your language first.