Comcast Internet $15 off per month for 12 months
Call 800-934-6489 and choose the options to disconnect/cancel service. I tried the options to activate new service or upgrade and they gave me nothing. The only thing they said they had was a bump from the 12 to 20Mb/s service at no additional cost for 3 months.
You may have to select option 3 at the beginning for 'more options' to get the disconnect service option, and you might sit on hold for a while after that, as they probably arent inclined to give prompt service to people who want to disconnect.
Got a really nice lady on the phone. I told her that I got a promo the year before for $15 off a month for my 12Mb/s service and that they'd told me to call again. She quickly said there was no problem with giving me the same discount for the 12 months again. I asked about deals on faster services, and she offered me 20Mb/s for $5 less a month than I was paying for 12. I took that deal, mostly because we often have more than one HD netflix stream going on in the house and the browser response time gets a little clunky when thats going on. Much better with the 20Mb/s.
$180 off over a year for a 5 minute phone call is pretty decent, as is $60 off with almost twice the speed.
Save the phone number...I couldnt get anything by calling some of the other numbers that were kicking around, or at 800-comcast.