Skype web application in PHP

Hi, We need a Skype web based application using the Skype API with the following features: 1. Ability to make/receive Skype to Skype audio and video calls. 2. Ability to have IM conversations. 3. Ability to see contacts list and search through them. The code must be done in such a way that an API can be developed over it. You will be provided with the design PSD's. Regards, Abhishek