Good for students and great for the environment, CafeScribe is a marketplace for e-textbooks and a social network for students. Offers e-texts that are often cheaper than used textbooks. With the downloadable reader, students can take notes, organize texts like mp3s, import their own PDFs, and share notes with other students. Students benefit from what the service calls Textbooks 2.0, and at the end of the school year, more trees are left standing. URL: CafeScribe.