I have had a few clients want to use Seminar component  (thanks to Dirk for excellent work) and ask for xmap plugin. I made this Xmap plugin and thought it may be of use to the wider Joomla community so have made it available here. It may work with Xmap 1.8 and 2.0.
(Install with Xmap plugin installer... Admin -> Components -> Xmap -> Extensions -> Install)

Download: com_sem_xmap.zip