http://www.engadget.com/2008/01/02/skype-coming-to-sonys-psp/
A great read for PSP owners and fans alike. :D
EDIT: Read the update. Sony does some ultra-sneakiness in their promo video. For one frame, it says "Make calls with skype"
http://www.youtube.com/watch?v=iyLhpUPNPIs
360 IS OPERATIONAL AFTER 37 DAYS!