I currently have 1 Slingbox available on Comcast's Xfinity X1 service with Harrisburg and Philly locals, plus Premium channels, and Sports Channels (including Root Sports Pittsburgh, MASN, and Comcast SportsNet Philadelphia). PPV Sports Packages, such as MLB Extra Innings, can be offered upon request, but the customer must pay for the package in order for me to activate it.
Also, speaking of MLB Extra Innings, if you're living in LA, and are a fan of the Dodgers, I'll be more than willing to help you out.
Send me an email for more information.