Anonymous Howard writes "Designtechnica has a news article about Comcast and Microsoft announcing an agreement to test digital TV services using the "Microsoft TV Interactive Program Guide (IPG)". The trial is scheduled to start this fall using Motorola DCT2000 set-top boxes. The software is designed to help network operators get more value from on-demand and other digital TV services."
There are some more details
in an article over at CNET News.