Details are sketchy, but rumor has it that Disney, the parent company of the ESPN networks, is planning to stream live sports via XBOX Live.  According to the short article that I read, it will be similar to the ESPN360 service that is currently available online.  As an avid sports fan, ESPN is one of the major reasons that I still have cable at all.  If this plan comes to fruition, I will almost definitely kiss my cable bill goodbye.  Between Hulu, Netflix, and this, my entertainment needs will be satisfied.