After reading this thread I added Comet to my main favorites list. This is the 3rd sd channel with guide data that Dish has added (including Laff & Grit) that I also get OTA, without guide data. I've started a separate fav list that only has the 6 channels so I can see the guide data on the Dish channels but watch on the OTA channels which have better picture quality. It's kind of a pain to switch guides just for 3 channels but it's easier than finding the Dish channels in the main guide and then going back to the OTA channels. I know that I could get a Tablo, Tivo or a number of other set top boxes with guide data as someone mentioned but those cost money.
I don't know why if the Dish channels have guide data that the same OTA channels don't have it??