I wasn't sure whether to post this here, or over in the other
post by greentips, but seeing as this has the most recent discussion on the topic, I'm putting it here:
LightSquared denied broadband licence
The US Federal Communications Commission has denied LightSquared the right to start mobile broadband services as they risk interference with aircraft navigation systems. It also faulted aviation industries for using receivers that pick up signals in neighbouring bands of the spectrum.