...I'm not up to speed on Bittorrent, but are they specifically blocking Bittorrent, or is coming under the ruberic of "thou shall not run a server behind your cable modem"? Certainly I can see that the 'net is supposed to be peer-to-peer and your server shouldn't be blocked from your residential connection, but can't you usually upgrade to a "business" package and get around those limitations? On the one hand I suppose you could get mad at having to pay extra for the "full" internet. On the other hand I suppose that someone could equally say that they're offering a discount for offering less services.
I'm interested to know what other sorts of things/applications ISPs may be blocking. Is there a name-and-shame site out there listing various ISPs and what they don't allow. Kind of a Consumer Reports for ISPs? And I suppose someone has crunched the numbers and knows what percentage of people are only served by one broadband supplier. Is it 10% of the population who can't get DSL, wireless, satellite or some other form of competition of some kind?