As more B2B businesses are taking advantage of Tumblr’s unique offerings, it is becoming not only a resource for increasing brand scope, but also for discovering new tools, techniques, and information. Here are a handful of up-and-coming Tumblr marketing blogs to follow: Marketr Marketr is Tumblr’s official sales and brand strategy blog. Besides keeping us up-to-date on new Tumblr marketing features, they share examples of successful campaigns from other brands. Union Metrics Union Metrics...