This thread is dedicated for great deals online or otherwise specifically for this Holiday Season.
Comcast cable internet connection through BestBuy: A modem worth around 70~100 bux, free after mail in rebate & and so is the self install kit. Currently going for 19.99 for first 6 months. No contracts & thus if you decide to move on after 6 months, you get to keep the modem. I think after 6 months the regular price for cable-internet is $57 per month but if you have Comcast cable, it will go down to $42.99.
If you get internet cable by calling comcast, you have to buy the modem from them or somewhere else.