I just called Comcast and got my internet price cut from $42.95/mo to $19.99/mo for 12 months. I did have to make a commitment not to leave in the 12 months, but I have no intention of leaving right now anyway. (I have recently considered Clear, which just came to Atlanta, but I don't want to suffer the step down in speed.)

EDIT: That's a savings of $275 over the next year.

All I did was ask nicely, and they gave me the special price. No yelling or threatening to quit necessary!

They also offered Showtime for $5.95 a month, FYI.