@Netweaver

I am looking at developing this when my n900 arrives.

The telepathy deals with text chat and from my understanding this is what is used for sms's. The main issue is how voip companies allow you to send an sms. Some allow using a simple url containing everything in the url, others use email to sms and some web interfaces. The provider i am looking at provides all three of these. Making it more difficult is the face that web interfaces are all different and finding a way to template these for different providers would prove difficult.