Host's such as www.netfreehost.com
and http://hosting.cfe-clan.com

Setup forums for you without any trouble.

www.netfreehost.com - Fast Setup, some ad's on very first post of every topic. Need to pay for backups? I dunno about that one. Unlimited Space and Posts, images, edit it all the way to your satisfaction.

http://hosting.cfe-clan.com - Slow setup, No Ad's, A support forum, setup by CFE Administators to keep the lowest ammount of errors towards your forum. Includes with 532 Smilies and 30 MB Space.