Just an FYI to all that starting on 06/15 Comcast started airing ads about how they'll be doubling Comcast Blast to the 50 and the Extreme 50 to 100 for free soon. May be why all the 8 channel bonding. I only know about Northeast. Not sure what the rest of the country will be doing but this is in response to the Fios Bumps
Saw the same commercial, but they didn't specify which packages would be doubled. The commercial I saw merely said "two of our fastest tiers." I do hope you're right though because I just recently upgraded to the Blast package.