Free Press has released Blocking or Metering: A False Choice.
Here's an excerpt:
The bottom line is this: Making consumers choose between having applications blocked and limitation pricing is what economists call a Morton’s Fork. Neither path is desirable because they both have the same outcome: reducing the innovative power of the Internet. Such an outcome would do great damage to the major driving force behind much of the social and economic change that has occurred over the past 20 years—not to mention all the benefits the Internet promises for the foreseeable future.