Good idea ... buy/sell, housing, and rideshare especially Do you think it would work best if it was walled off? For example, if an @myschool.edu address was re

Good idea ... buy/sell, housing, and rideshare especially Do you think it would work best if it was walled off? For example, if an @myschool.edu address was required to sign-up/access (similar to what yammer does).