I picked this up from the Iridium website. Iridium LLC is providing a free number to call to test your Iridium phone from 21-27 May of this year. You can read the full article at:

http://www.iridium.com/TYP_week.htm

Colin

I opened the link but did not find an article, or, test phone number

They changed the URL, here is the new one and the phone number

http://www.iridium.com/support/TYSP.htm

00-1-480-752-5105