How long should I sear meat after thawing from frozen state?
The Sous Vide Supreme website recommends reheating in the water bath for 45 minutes per inch of thickness (adding 30 minutes if reheating from frozen).  I would do this at a temperature equal to, or a degree or two lower than, your initial cook so as not to over cook.  Then sear or grill as normal...a minute or so per side.