Today, the developer Ready at Dawn updated her site. Daxter ain't the only game in Ready at Dawn's list, there is also a new game with the title 'Unannounced PSP title'. When you click on this title, the picture on the site changes blood-red and you see the words 'Coming Soon' appear. Nothing special, except for the fact that those words are written in the God of War-font.
You can find this site here: http://www.readyatdawn.com/psptitle.html