I am concerned about the burden that JoomSEF might put on the database of my server, but it seems that a caching accelerator might make the burden minimal as most of the viewers of the site are not logged in.

Has anybody tried using a caching accelerator (Joomla Perfromance Booster from Joomla at Work or others) to increase site perfromance with JoomSEF?

Any problems you encountered?

Did you notice any improvements in perfromance?