As this is my line of interest, may I suggest you peep at the following three links below.

Obviously, they are aiming the equipment at the commercial market to start with as this will generate the greatest financial gain initially so North America, Europe, Australia with its outback and China are the main target areas.

In time, other places will be covered but at least the equipment is relatively cheap.

The second article is dated September 2007 so things have moved on in the intervening time:

http://www.equipped.com/SPOT_ORSummer2007.htm

http://www.equipped.org/blog/?p=73

http://www.findmespot.com/Files/download...NAL%20Final.pdf