I'm not opposed to advertising in general. I think targeted ads are great actually. For example when I read Wired magazine I find myself looking at lots of ads.
But these Comcast EPG ads? Wow - they are so lame. They already charge an extra $10/month/box for the HD PVR and now they are making their clunky user interface even worse. I would be happy if they use the set top box data and figure out how to present relevant ads. But they're not.
C'mon Comcast, you can do better.