Looks like Litespeed web server is releasing an open source free version called OpenLiteSpeed http://www.litespeedtech.com/latest/announcing-the-release-of-openlitespeed.html
Screenshots for admin control panel for folks not familiar with Litespeed Enterprise's GUI based control panel posted at http://vbtechsupport.com/2165/
Will be interesting to see how OpenLiteSpeed fairs :)