Do we know how much he's actually worth?
If you're skeptical of numbers on webpages (c.f. "EmptyGox"), MPEx's trivially traceable addresses[2] currently contain around five thousand coins; tracking down the rest is left as an exercise for the skeptical sleth.
CL-USER> (* 1/2 (expt 10 9)
(parse-float "0.00029087" :type 'rational))
145435