Brian,
Any store that does Social Media right, has a leader at the top that has their organization in such great condition that Social Media is a natural extention of their daily operations.
Keyword to ponder: Organization.
<rant>Most leaders of dealerships are firefighters, not visionaries, and certainly not risk takers (read: entrepreneurial). Like lemmings, these leaders they follow what others do, blaming the handcuffs they wear on circumstances that surround them.
It's these sea of morons (aka leaders) that mindlessly "follow the pack" into Social Media because everyone else is doing it. To these players, their entire Social Media business model lives on 5 minutes of research and 34 seconds of planning. They don't get it and they wont get it... ever.
Oh... and just wait until the evil twin of Social Media comes out and WACKS them. Dealer Reviews has the potential to be the single greatest threat to Dealer Leadership since Al Gore invented the internet. By this time next year, I see droves of GMs and GSM's in the fetal position, sucking their thumbs wondering how this all got away from them.
I am well known for my dis-taste of Social Media. It's not Social Media that irrates me, it's.... us. Every where I look I see lackadaisical leadership that is so un-prepared for the "Bright Light of Social Media".
I swear the Franchise System (Manufacturer to Dealer) has sucked the balls out of decision makers. It has rewarded GM's that defend it's turf, not those that conquer new ground. Boys.. I hate to tell you.... new ground is coming your way!
- They say: "I found my high school buddy in Phoenix so it has to work!.. let's get on facebook now!!.".
- I say: "Becareful what you wish for, you're not prepared and a bandaid wont fix it"
</rant>
Brian,
I haven't had time to read Ed Brook's link to Jay Bayer, clues maybe in there, but, from my seat right now, just like Social Media itself, you may not beable to pigeon hole it into a ranking system. This connects to Rob Fantano's great observation that SM has to be created inhouse because its an extension of the spirit of the stores leadership (see rant above 
