Forum hosting providers

ezBoard
Remotely hosted message boards. Available for free (with ads) or with a license fee varying depending on traffic to the forum.

Lithium
Hosted ASP business community platform.

MesDiscussions.net
Remotely hosted french based and PHP powered forum software.

React
Dutch based remotely hosted message board solution.

Zero Forum
Remotely hosted message boards. Forum size dependant licensing.

Freeminz
Free ad-less forum hosting service also including free search engine submission.

Free phpBB Forum Hosting
Jconserv Pre-Installed MODs, 140+ Templates Sub-Domains & Unlimited Bandwidth.

Free Forum Hosting
Free phpbb based forum hosting system, free subdomain and over 300 skins.