Yesterday at NCTA, Microsoft introduce Microsoft® TV Foundation Edition what they descirbe as "a new digital TV software platform designed to help cable operators get more value from on-demand and other digital TV services"
They simultaneously announced support (http://www.microsoft.com/tv/mstvIndustrySupportPR.mspx) for the platform from cable industry vendors Motorola, Inc., SeaChange, Concurrent Computer Corp., MetaTV Inc., Two Way TV Ltd. and Advanced Digital Broadcast Ltd.
They also announced a customer win (http://www.microsoft.com/tv/cablevisionselectsmspr.mspx) for the software platform with Televisa's Cablevision (CVC) subsidiary, one of Mexico City's largest cable MSO with ~450k subscribers announcing that they will adopt it.