There has been a few posts about Revit content recently, one being at http://chrismounts.com/content/places-find-revit-content and another at http://excel2bim.com/revitbim/?p=2238. These are related to a LinkedIn discussion on Club Revit.
Some of you would be aware of the Revit Blog Directory I have set up. I have taken this content link list and added it to the blog directory site at http://www.revitprofessionals.com/