For the most part, the vast majority of dealers are on Facebook. Most are using Twitter to some extent. Google+ and Pinterest is about 50/50 from what I've seen looking at dozens of dealers over the past couple of weeks.

What other social sites does your dealership use? Vendors, what other social sites do you recommend to your clients? Are you finding success beyond the obvious "Big 4".

YouTube, Flickr, and LinkedIn are also included, of course, but are not necessarily the same as the others in that YouTube and Flickr are more content venues than social networks and LinkedIn is really for recruiting rather than trying to increase business. What about the others? Tumblr? Foursquare? Scoop.it? Something else?