Buying a pair of headphones or a new pair of kicks online is a thing a ton of people do on a regular basis. Now you can buy stuff on Twitter. In fact, you can buy your next car with tweets. Acura is rolling with the new system that allows you to configure and buy a brand new car with 140 characters or less. The only down side is that you don't get to drive to a car dealership and deal with a lovely salesperson who is getting his/her commission eaten up by a little blue bird.