Available at the Playstation Store, the Skype Video and Voice calling app allows for free Skype calls on PS Vita. Skype for PS Vita features high quality video calling utilizing the front/rear cameras on the device, as well as the ability to run the app in the background. Gamers can pause a game and make a call, only to return to the game afterwards.
http://www.youtube.com/watch?feature=player_embedded&v=FpMqz_G2FB8#ws (http://www.youtube.com/watch?feature=player_embedded&v=FpMqz_G2FB8#ws)
Source: Skype