I recently saw an article on Yahoo about this very thing. It prompted a memory of searching my state a few years ago, resulting in $50 for a friend that had no idea it was out there. Curled in my chair with a blankie this afternoon, I searched two different states for family and friends, shocked to find unclaimed funds for several people.
Using a search engine of your choice type in the state name followed by "unclaimed funds" which should bring up an official state page where you can enter search criteria. Ladies, please be sure you check both maiden and married names for yourself.
Hope it's a nice surprise for some of you.