lo puse en un comentario pero tambien lo dejo aca porque me parece muy bueno

Go!Messenger lets you call your mates on their PC, as well as PSP™, so you can now stay in touch with everyone. All you or your friends need to do is download a nifty piece of software for free, called 'BT Softphone 2'. When installed, you can make and receive free PC to PSP™ voice and video calls. What's more, once you both have the software you can also make calls and send instant messages from one PC to the other.

 Basicamente dice que se pueden hacer llamadas al PC desde la PSP o al reves osando el BT softPhone2 ....

espero les resulte tan interesante como a mi.

aqui esta el link para descargar el programa para el PC

 LINK a la pagina