I am going to try porting my PC python script for interfacing to the SM5100b directly to the RPi instead of converting it to an Arduino program.
UPDATE: Wow… it was easier than I thought it would be. I was able to quickly get to the same level of functionality as that previous post in less than an hour. Here is the push message posted to Prowl app using the cellular shield by a python script running on the Raspberry Pi.
Updates project files should show up on my github soon.