Duane Simpkins (1992-96) is in his first season of coaching the varsity boys basketball team at Sidwell Friends School in Washington, DC.
This article in Italian seems to say that Duane played for the Shangdong Lions in China in 2003-04. Another earlier article from the same Italian website gives the best summary of Duane's career and says that he has been signed by Olympia in Italy for the 2002-03 season. Paraphrasing the Italian, it says he played in Belgium for Bree BBC in 1996-97, in France for Elan Sportif Chalonnais in 1997-98, then bounced around the CBA, USBL, and ABA. The article also calls him a "ferryman", but I suspect Google is mistranslating "journeyman". In 2001, he played for the EA All-Stars basketball team.
Simpkins's most famous moment at Maryland was, unfortunately, when it was revealed that he had racked up over $8000 in parking fines on campus. They even made fun if it in the Italian article I translated.