Developer Tutorials - Contains a quality list of remotely hosted discussion boards sorted by ratings. - http://www.developertutorials.com/scripts/637/665/
CodeJunction.com - Provides a list of remotely hosted discussion board providers both free and commercial. - http://www.codejunction.com/scripts/remotely-hosted/discussion-boards
123webmaster.com - Hosted message board systems arranged by date and editor reviews. - http://www.123webmaster.com/Scripts/Remotely_Hosted/Extras/WWWBoards/
Scripts.com - Contains links to remote discussion board services both free and commercial. Sorted by date added. - http://www.scripts.com/remotely-hosted-scripts/discussion-software/
Hotscripts.com - Directory which lists free and commercial message board providers. - http://www.hotscripts.com/Remotely_Hosted/Discussion_Boards/
The Perl Archive - Comprehensive directory of message board services listed by user ratings and reviews. - http://www.perlarchive.com/Remotely_Hosted/BBS/
The CGI Resource Index - On-line message forums organized by ratings and comments. - http://cgi.resourceindex.com/Programs_and_Scripts/Remotely_Hosted/Bulletin_Board_Message_Systems/
Free Center - Ranking and reviews of free forum providers. - http://www.freecenter.com/forums.html