A video showcasing the ability of a Jailbroken iPad 3G to send text messages via command line terminal was spotted on youtube. It was uploaded by an user named @MuscleNerd and it shows an iPad 3G sending  text messages using  T-Mobile’s  SIM plan  to another  iPhone. As you can see in the pic the messages was sent  using the command line interface making use of piping instructions.

You can read all the details in this pic he uploaded on Twitpic: