Somalia update: Yemen, the next pirate coast?

In my discussions of Somali piracy, I have not infrequently mentioned that the problem is not a Somali problem alone.  My very first post on modern piracy noted that both Somalis and Yemenis were taken from the now-famous M/V Quest, and in my post on the "Jeffersonian past" I proposed that Yemen may become a new center of pirate activity.  The map of pirate attacks up to 2010 clearly shows a high concentration of reported incidents immediately off of Yemen.  The cultures and governments of Yemen and Somalia have had a long, close relationship; Yemen has unconditionally accepted Somali refugees.  But does this really mean that Yemen plays or could play the same role as Somalia as a pirate haven?  I decided to look closer at history and recent events.