Apple ipod

Nokia has a software that lets you send texts through your PC, is there something like this for the iPhone?

Recently changed from a Nokia E71 with an iPhone 3G. Is there any other application (jailbroken or not) that allows me to send a text via my PC as I could with the following Nokia OVI?

FMA (Float Mobile Agent) is a powerful tool for editing free phone allows users to easily manage all personal data stored on their phones through a number of different connections methods. FMA can also will allow the collection and dial calls directly from your PC. FMA is fun and more all they want, it is everything a mobile phone should have http://fma.sourceforge.net/index2.htm

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