Oh and as for a legitimate use of hitting 250gb a month, I've hit that before. I design images for many different lines of computers where I work, so pulling down 10-30 gig image on test machines at home to test new software, or new user policies, isn't uncommon. Telecommuting for me wouldn't be possible if the unlimited service I was paying for wasn't unlimited.
Then you are using a residential account for commercial use. That is not a legitimate use. Commercial accounts do not have limits.

As already stated, the limit has ALWAYS been place, its just been made public. You guys are fretting over something thats been there all along. Tin foil hats anyone?

edit: And before someone trys to pull the "why do commercial accounts get it better than us?" routine, use the same principals as someone buying a 1st class ticket for an airplane. You want the perks? You got to pay for them, this isnt something Comcast invented.