Twitter has topped (100 million active users. Among the interesting usage stats the social network announced, 55% are mobile users, and 40% don’t tweet, logging in only to check out what others are saying. Tumblr users are also prolific, pushing the young network past 10 billion posts, with a third of that coming in just the past three months) (Ad Age, reg required) (Mashable)

Parents have found a new way to cut back-to-school spending (by going shopping without their kids, thereby sparing themselves the constant begging for unnecessary items) (WaPo)

Considering how teens and 20-somethings are glued to their cell phones (it’s no surprise that 18-24 year olds spend more time than their peers playing mobile games, but when it comes to cashing in, it’s the 25-54 year olds who pay for “freemium” gaming content such as unlocking additional levels or in-game props) (Flurry)

Here’s a look at what it means to be an ‘influencer’ (and how brands are trying to latch on to that cool caché to sell products) (Forbes)

Check out the limited edition Nike Air Mag, er, McFly shoes which are “back for the future.” They’re sure to be on every sneakerhead’s list. We can’t wait to strap on a pair of these and hop in our DeLorean to cruise the skies! The best part? Buying a pair amounts to a donation to the Michael J. Fox Foundation for Parkinson’s research. Speaking of cool ways to give back, “Glee” creator Ryan Murphy and the National Association for Music Education are partnering on a contest to give $1 million to struggling school music programs. Fans can donate to the cause or nominate their school to get a grant) (Wired)

The controversial rap collective Odd Future (is getting its own show on Adult Swim next year. Called “Loiter Squad,” the show will include sketches, man-on-the-street segments, pranks, and, of course, music) (MTV)

Finally, for a little friday fun… (it’s time to get a Foursquare account if only to play Foursquaropoly! The more popular a location on Foursquare, the more expensive the Monopoly-style rent is. Get in early to get your hands on the local coffee shop property!) (PSFK)