Interesting Maritime Roaming SIM.
 

I caught this article today which was targeting primarily Filipinos serving on ships. I wasn't sure whether or not the Maritime deal would be helpful to others but I posted it up there for discussion:

Globe makes call, text affordable to seafarers | ABS-CBN News

Of course, being a Filipino might help make this useful.
The market is there apparently!
Does any other roaming SIM claim 650 GSM networks?
Also, landlocked countries might not be available.
Tough luck Paraguay, Switerland, Slovakia!
Then again maybe the Rhine and the Danube have Filipino seafarers on them.

OK, here is the URL
 

The Filipino carriers have long had good rates for texting back home while abroad. It was easy to activate. You just had to send a text to a service number before you left the Philippines.