How to connect Apple iPhone 4 FaceTime to PC?

iPhone 4 Facetime to PC based Video Chat integration: Need to know how to let iPhone4 Facetime to call a PC based Video Chat Software and send the live video/audio contents captured by iPhone 4 FaceTime to PC/Laptop running one of the major Operation Systems (such as Microsoft Windows, Mac OS, or Linux), via the WIFI network. USB cable data synchronization is NOT an acceptable solution. Deliverables: (1) A successful demo of iPhone 4 Facetime to PC based video chat (voice and video). (PC side video chat software can be any of following: iChat AV or Fring, or Google Talk or Yahoo Messenger, or MSN or AIM, or Skype or other mainstream video chat software or other open source video chat software ) (2) Detailed instructions about how to create such demo. Including all steps and extra software on iPhone 4; all steps and extra software on PC. The cost of any extra software need to be communicated before the demo. We should be able to re-create such demo following the instructions