I think conservative talk radio and the right-leaning websites will be gone before the '08 election. Some of the left-leaning sites may have to be sacrificed to get rid of places where people can get the "other side" of the news, but I don't think they'll put up much of a fuss since they will view it as to their advantage since they don't like free speech anyway.
Like you, I doubt that it's necessary, but the Democrats won't take any chances since they are going for the whole ball of wax.