Smfforfree.com - Offers free SMF based forum hosting. Ad-supported. - http://www.smfforfree.com/
Timur.com - Provides a free, customizable forum hosting service. - http://www.timur.com/
Forumlaunch.com - Provides commercial forum hosting services. - http://www.forumlaunch.com/
Discussforum.net - Provides commercial discussion boards which are optimized for web speed. - http://www.discussforum.net/
CSD Clubs - Clubs service with multiple themes and layouts configurable per club. Ad-supported. - http://csdclubs.com/
Smfhost.com - Provides free and paid forum hosting based on SMF software. Ad-free. - http://www.smfhost.com
RelyNet - Remotely hosted ZeroForum and Unite discussion board engines. Commercial. - http://www.rely.net/
Buildaforum.com - Provides commercial forum hosting. Ad-free. - http://www.buildaforum.com/
ZeroForums.com - Offers free phpBB and Invisionboard hosting. Pre-installed skins and support forum available. Ad-supported. - http://www.zeroforums.com
DKAT Internet Services - Paid discussion board hosting services for corporations and large organizations. Also offers password protected forums. - http://www.dkat.com/
BbBoard - Offers a feature-packed message board system. - http://bb.bbboy.net/
Moncom.net - Free open discussion forums which can be used as a regular discussion forum or knowledge base. - http://moncom.net/
Aimoo Forums - Hosted discussion boards which include a WYSIWYG editor and allows customization. - http://www.aimoo.com/
ForumExperts - XML based hosted forums for corporate and enthusiast websites. Logical threaded layout, markup features include images and formatting. Implemented through customizable control panel. - http://www.forumexperts.com/
Best Web Board - Offers paid message boards with no ads. Supports custom colors and styles. - http://www.bestwebboard.com/
AtomicBoards - Offers free and paid customizable message boards. Free boards are ad-supported. - http://www.atomicboards.com/
PoppyDog Web Tools - Advanced website tools for building a variety of forums and message boards with optional marketing, advertising, and community features built in. Free. - http://www.poppydog.com
LiveBoards - Commercial discussion board provider. Features include content scanning, private areas and configurable look. - http://www.liveboards.com/
Le Forum - Offers a highly configurable discussion board hosting service. Ad-supported. - http://forum.europeanservers.us
Raidersoft - Simple message board solution for small communities. Paid version available. - http://mb.raidersoft.com/
Stereodreamscene - Paid discussion board hosting service powered by Snitz Forums. - http://www.stereodreamscene.co.uk/
SiteForums - Forums are easy to manage, flexible, and can be graphically customized. - http://www.timtyler.com/siteForums/
Lithium Technologies - Commercial discussion board hosting. Features extensive management tools, to allow simple, easy management of communities with minimal moderator intervention. - http://www.lithium.com/
Eboards4all - Offers free ad-supported discussion boards. Features include customizable layout, smilies and moderator options. - http://www.eboards4all.com/