Connect Minnesota has a collection of the mapping and tools available. Last summer they did a phone-based survey with residents focusing on broadband use; they also have an ongoing project mapping broadband access in the state. Here’s more info on bother from their website:
Consumer Broadband Adoption Trends
Connect Minnesota has conducted a survey of 3,032 residents across the state to see if they access broadband, and if so, how they are using it. In addition, we have conducted the largest state-level survey of people who do not subscribe to broadband to see what is preventing them from joining the digital community. Get more info by visiting the site to check out their interactive infographic.
The Connect Minnesota mapping initiative is working closely with broadband providers from across the state to develop a variety of broadband inventory maps for public use.