What’s the sound of one hand clapping? We don’t know! But given SoundCloud’s explosive growth, there’s a good chance the answer may already be uploaded. The music sharing network recently celebrated surpassing 5 million users with an interactive timeline that highlights milestones in its evolution. SoundCloud is one of our favorite partners. Most of our members have updated their profiles and share their links through them, so give yourselves a little pat on the back.