Study Blue, a collaborative studying tool that I reviewed a couple of years ago, recently launched a new service called Friends with Brainefits. Friends with Brainefits is an application that works within Facebook to help students help each other study. The basic idea is that a student will select a topic (or topics) from which a new vocabulary term will be selected. That term is then posted on the student's wall for his or her friends to add a definition or example to for the purpose of helping each other remember the vocabulary terms. The Slideshare presentation offers an overview of Friends with Brainefits.