Among all the hosting companies that provide forum -friendly environments I'd draw your attention to such companies as glowhost.com, powweb.com and hqhost.net.
Their prices are cheap and there are many useful features in their package plans.

I wonder how do you determine which package is friendly and which is not?

I wonder how do you determine which package is friendly and which is not?

I think such firms should support PHP and MySQL or others need to have blog hosted with no problem.