They may not be licensed to operate outside of the US (OTOH, they might be, I don't know).
There may also be technical issues with broadband data outside the US. It will depend on how the satellite is "aimed," and how the transponders are rigged.
INMARSAT systems (like the MagnaPhone) are usually OK, because it's "a phone," and was designed and licensed for maritime use.
There are a number of systems for terrestrial INMARSAT, all of them that I know of are primarily voice with some limited data subsystems (up to 64K), some will also do FAX.
There are also VSAT and USAT data systems that will operate in most countries. VSAT would be a system like Walgreen's uses (used to use?). VSAT systems can be handle up to multi-megabit throughput, but typically run asymetrically with ~384 down / 128 up. The providers may allow short increases in bandwidth (a phone call to "control" at least an hour or two before you need it) for things like video-teleconferencing.
Rates (last time I looked): INMARSAT - ~US$5.00 per connection, ~$1-2 a minute. VSAT/USAT is a signup charge, and metered by the KiloByte, usually with some amount allowed as part of the monthly charge...something like $5000.00 to sign up/set up, and $800.00 a month which includes 20 Meg of data, and $1.00 per Kilobyte after that.
I'm sure the rates have changed since the last time I looked; I haven't been following it like I used to.
Good Luck
Scott