AVR GSM Cellular Development Board

I’am working on a school project. I’am building a burglar alarm system with motion detector. anytime the alrm goes off the system will make a phone call or text a message to the home owner. I would like to use the AVR GSM Cellular Development Board http://www.sparkfun.com/commerce/produc … ts_id=8700

Could anyone give me a tips how to connect the motion detector to the board and to connect the all system.

thanks