This is from Vista news letter. It's very interesting and a must read. I have not verified any of the info but I believe it's true
And Sean D. tells us about another cool-sounding product: "I love my HTPC: If you buy a product called the HDHomerun, you can get free HD content from Comcast without paying the extra 10 dollars a month. Comcast broadcasts the QAM signal "free" over the line. The HDHomerun takes that QAM signal and broadcasts it over the Ethernet to your media center pc, which sees the HDHomerun as two separate digital tuners...voila, 2 simultaneous HD recordings at once and no extra monthly HD content cost. Plus if you split the cable (put one into the HD Homerun and the other into your analog tuner card) you can record those same two hd channels PLUS an analog one or a STB signal for a total of three simultaneous recordings."
http://www.vistanews.com/CM80QS/080110-HDHomerun