To be honest, for the compensation offered here, I'm not going to go overboard and do any research myself in compiling your data. However, I have a great, comprehensive report sitting on my desk right now which I would recommend to you given what you are asking:
Broadband Wireless Access Operators: A Global Survey and Analysis, by ARC Chart research, April 2007. ARC Chart is a UK company, and generally I like their research. This one is global in focus, but considers North America separately in section C "Operator Profiles by Region". It provides case studies in rural and also provides cross-sections based on radio type (WiFi, WiMAX, etc)
The report is hot off the press, just out last month. Contact ARC at service@arcchart.com, or call them at +44 207 826 9000. I may be able to get you a 25% discount. You will need to contact me to see if I can get you this.
No I have no official link to ARC, although I have blogged about their wireless broadband work in the past: http://news.techdirt.com/news/wireless/article/2604
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Derek Kerton
The KERTON Group
Strategy - Partnerships - Marketing