1. The Ben and Jerry's ice cream truck tweets its location so people can find it and buy ice cream. 2. Researchers in Tokyo have created touchable holograms using ultrasonic waves and Wiimotes that allow users to feel virtual objects. 3. Pepsi's Refresh project allows people to vote online for ideas to help the Gulf region recover from the BP oil spill, and Pepsi will fund the top ideas with $1.3 million.