Further Reading
AT command guide
The Iridium AT Command Guide, version 5 lists all the commands available for your RockBLOCK.
SBD Developer's Guide
The 9603/N Developers Guide
The 9602 Developer's Guide
JavaScript Library
You can download RockBLOCK's own Node.js library here.
Iridium SBD Library for your Arduino
The IridiumSBD library uses the RockBLOCK/Iridium’s SBD (“Short Burst Data”) protocol to send and receive short messages to/from the Iridium hub.
Makersnake
Makersnake is a RockBLOCK enthusiast's blog which has some great information and tutorials, particularly based around the Raspberry Pi.
There you can find an excellent worked project example - a remote controlled weather station.