Two recent related developments:
1) John Deere has estimated impact of LS proposal to the agriculture industry at $30B: http://www.bloomberg.com/news/2011-08-24/deere-says-lightsquared-may-cost-farmers-30-billion-annually.html?cmpid=yhoo
2) Dish Network has now asked FCC to let it build a similar solution for terrestrial broadband: http://www.theregister.co.uk/2011/08/24/dish_networks/
The Dish proposal is to use satellite frequencies for non-satellite communications. In a weird way, this might move the battle over to the correct topic -- intended use of frequencies, rather than "interference".