I'm thinking of using S2Member and want to have an integrated Forum plugin to allow the member registration to also control and give access to a forum section on my website. Is there one you would recommend that will use the same S2Member access level and profile information.
Any form that works from within WordPress should work for this. For example bbPress or simple:press, but there are more you could try. The restriction would be applied using the URIs. WP Admin -> s2Member -> Restriction Options -> URI