Iridium Sim & Airtime
 

In preperation for our overland trip around Africa and further I have bought an Iridium Satphone.
We will be leaving Holland in september 2006 heading down the west route.
I am looking for a good address to acquire a SIM and prepaid airtime. Prices vary greatly and any advice on where to buy will be welcome.
I am also intersted in buying a used SIM with or wiyhout airtime

Regards

Ian