Distance barriers are overcome. Students can work together even though they are in different buildings or even different cities. Teachers' comfort level maintained. The learning environment is active, student centered. Pride of ownership.
Students help create the information base.
Socialization, personal interactions, and peer pressure motivate students to achieve. Student comfort level goes up. Students can work at their own pace, at their own best times. Student participation can be made anonymous, where that is desirable. Students can be inspired by knowing the labors and insights of their peers.