This year in viral video, advertisers either broke new ground or just got better at old concepts. ... But what is clear from this year's top 10 is how passion—for a company, brand or creative concept—continues to drive innovation in viral video advertising. From scrappy startups like Dollar Shave Club to independent producers for PBS, viral video marketers seem to love what they're doing. Here are the top 10 most innovative viral video ads of 2012. Let us know your favorites in the comments below.