The story on CNN.com has some additional details. Like you said, he hadn't filed a flight plan. He didn't have a parachute, doesn't have his sat phone with him (he was only going for a "short flight," and apparently didn't think it was necessary), and the ELT on his plane isn't transmitting. All of that being said, this guy has been around the block a few times, including aviation emergencies, so hopefully all will turn out OK.