Fox Trails now has it’s own web site: http://www.foxtrails.org

If you have obtained Fox Trails using our subversion repository, you can perform a svn switch command to use the new server’s name. Be sure to backup any local changes that you have made, just in case the switch command reverts your changes.

If you are using TortoiseSvn, right-click on your foxtrails location, then choose Relocate from the menu. The new location is http://www.foxtrails.org/svn/FoxTrails/trunk

Here is the actual svn command, in case you are using a command line or another SVN client.
svn switch --relocate \
http://www.marquisenterprises.biz/svn/FoxTrails/trunk \
http://www.foxtrails.org/svn/FoxTrails/trunk