Who is Susan from Microserfs and what is their importance?

Susan becomes rich when her Microsoft stock vests. She throws a party and hunts for a house. However, Michael's new company attracts her as a major investor. She ends up making more money when the company becomes successful. Not very successful with relationships, Susan puts her energy into a support group for women she calls Chyx. The group becomes wildly successful once CNN carries a feature story about it.