Still room for another Forum Hosting Service?

I hate to actually post my whole idea here in case theres any developers who like my idea here but here goes. I want to use and re-code the phpBB2.0 core code but keep and secure the templating system of phpBB2.0 so I could release many styles for my forum hosting service.
Are forum hosting service's successful?

See original post by SimThePhpCoder