The always good Gigaom today suggests three reasons government should meddle in broadband : Education Access, Medical Care Improvements and Telecommuting.
I've always thought the best things Congress ever did involved infrastructure.
Land Grant Colleges
Rural Electrification Program
And you could argue the Space Program of the 60's helped trigger the technology boom that started in the 70's and continues today.
I consider a national aggressive broadband program that puts the goods of the citizenry ahead of the telecommunications company to be worth doing.