An Arduino shield list! Wow, this just keeps getting better and better! I will check that website right now and see what is on that list.
Thanks mr. Schmelle2 i will check your section of the list and yes, you can send me the code for working with your sensor please.
And how about using this:
NB2210 - NetBox Wireless Router
The NB2210 connects Ethernet enabled equipment to the internet over a mobile network (GSM/GPRS/EDGE) and makes your devices and data accessible from wherever you want.
Hardware Features
* Quad-Band GSM, Class 12 EDGE/GPRS
* 1 Ethernet port
* 1 COM port
* 2 digital outputs
* 2 digital inputs
* DIN rail mounting
http://www.netmodule.com/products/nb2210.aspx