You might want to keep an eye on a site called Pinterest. It had 4,000 percent growth from July to December of this year and currently boasts 2.5 million members even though it's still invitation-only. This is a meteoric rise reminiscent of the early days of, well, Facebook. Also in this program, Purdue University scientists are working on a way to harness the power of hip-hop bass beats to power medical devices.