Movies have been made about his exploits. The American government used his skills and then set out to destroy him.
When people talk about Bill Clinton and Mena, Arkansas... well, Barry was part of that. Hell, the family of Barry Seal took on Universal Pictures and Tom Cruise to stop the making of the film, Mena, citing that the producers didn't talk to the estate for the rights and misrepresented several facts of Seal's life.
Database site, NNDB, has a pretty good listing regarding Barry Seal.
Worth Reading:
Did Barry Seal fly the getaway plane when JFK died?
About Barry Seal with no mention of Clinton.
Seal's role in the Iran Contras.
Lots of Barry Seal info.
Barry Seal on Wikispooks.