He wrote the DV Rebel's Guide, he spent four years at Industrial Light & Magic, he's the guy behind Red Giant's Magic Bullet products. This TWiT interview is well worth a watch to hear him go through his career, great colour correction tips and DSLR know-how.
This TWiT interview is well worth taking an watch. For more information you can read his excellent blog over at Prolost. Incidently the TWiT coverage from NAB was superb and is a must watch for next year.