software that allows my phone to be used as a headset and mic on my PC

Not sure if it’s the right place to post, but here it goes:

Is there any software that allows my phone to be used as a headset and microphone for my computer?
The basic idea where I want this for is to use my phone to skype or yahoo massenger for chatting, and if it’s possible via bluetooth I would even be able to use my phone’s handsfree,
Any help would be highly appriciated….

Thanx in advance