Hello i new in this wonderfull forum
If anybody run linux than i can recommend:http://smstools3.kekekasvi.com/
(work with many types of 3g-modem, mobilephone and more)
here is an small guid how to do it. http://www.howtoforge.com/forums/showthread.php?t=47641
then you have a complete sms server with a webinterface. Smsserver tools also have a "eventhandler" , that means that when you receive an sms the eventhandler start an script, application with the sms information as an argument.
Its realy easy to make some fun automation with it.
/Andreas H (Sweden)