As we all know, Tumblr has already had a pretty big year. Highlighted by their $1.1 billion sale to Yahoo! in May, the passing of the 100 million blog threshold in March, and David Karp's appearance in our online cover story last week, the popular blogging platform has wasted no time in further establishing themselves this year, and appears poised to continue riding this wave of momentum in the last half of the year. With the site hosting more users than ever, though, it can sometimes be difficult to navigate this endless archipelago of GIFs, memes, and food porn. So to help you stay up on its latest happenings, we've found the 10 New Tumblrs You Need to Follow Now.