Thanks to Patrick, I now know that you can hack your Comcast remote to skip ahead 30 seconds -- handy for something like, oh, I don't know -- skipping commercials, maybe? :-) It never occurred to me that I wanted -- needed! -- to do this and as soon as I found out about it I couldn't wait to Google for the instructions. I found 'em! Here they are! I totally copied 'em from this guy (but of course I couldn't resist making a few edits -- occupational hazard, you know):
1. Choose an unused or unneeded button on the “silver” remote to be the 30-second skip command. (Patrick recommends the red "Help" button, as there is no Comcast "Help" feature).
2. Press the “Cable” button at the top of the remote to put it into Cable Box Control mode.
3. Hold the “Setup” button until the “Cable” button blinks twice.
4. Type in the code 994. The “Cable” button will blink twice.
5. Press (do not hold) the “Setup” button.
6. Type in the code 00173.
7. Press whatever button you want to use for the 30-second skip command.
Congratulations! You have just stuck it to The Man.