I misunderstood your initial query.
Does the FAA (or whoever is responsible) have an online form to fill in by those airlines who wish to see their flights tracked? Eg. if an airline/operator contacted you asking for their flights to be tracked, what action would you take with the FAA?
All civilian flights are tracked except for business operators that wish to be blocked.
damiross: Foreign operators using a 3 digit ICAO code for their flights (and possibly domestic operators too, I'm not entirely clear on it) have to request to be included in the feed. This is a seperate issue from the NBAA BARR program.
RobK: I don't know off-hand, but I assume the airline could talk to their contact at the FAA to find out the process. Given the low volume of such requests, I doubt there is a web form for it.