Everything on him is pretty sketchy and he virtually disappeared of the radar for a good year or so. There was a reported sighting in the last month or so in the southern U.S., and then the Sun (UK) reported that he could be in Britain:
http://www.thesun.co.uk/article/0,,2-2006480097,00.html
Prior to that you have to go back to last summer when he was believed to have attended a terror summit in Waziristan.
the state dept and FBI along with most intelligence suggest he is in Pakistan