I have had a few clients want to use Seminar component  (thanks to Dirk for excellent work) and ask for sh404sef plugin. I made this sh404sef 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.

Installation:
- unzip file, copy com_seminar.php to /components/com_sh404sef/sef_ext
- enable the seminar-component in the sh404sef configuration, this plugin will be loaded automaticly

Download: com_sem_sef.zip