crossfire, there are a couple of options. Iphone-browser and iphone PC suite. Try this first: iphonebrowser - Google Code
iPhone PC suite is supposed to be really good but I have nor tried it yet and some user are reporting some issues getting it to work properly. There is a thread over at hackint0sh. Please check that.
@Vivek, smsd, isms and wetools give you that functionality. SMSD is supposed to be good and incidentally written by an Indian.
ibrickr!! wat kind of a name is that for a iphone app....[not in my intrests to get stuck with a 500 dollar brick!!]:hap5: anyways jokes apart ill try that..... thnx man u really know ur iphone business inside out.....:hap2: