said by Cthen:Got an official Comcast letter with this months bill telling me they are raising the price of the Blast! tier another $10. No explanation as to why!

Not only that, they insulted my intelligence by wording the letter that I should be happy because I have to do nothing while this takes place.
That is likely because Ultra will be replacing Blast at that price (how much have you been cracking your head against the cap ceiling at your current speeds?). Most (in fact, all) the ones that have been complaining about getting a letter talking about a price increase are also the ones complaining about caps; while I did crack the caps twice, I have not gotten any such price-increase letter (Blast customr in the Washington, DC area).