Oh.. and one other thing:
-Better pointers to registration for guests who are browsing a forum. Right now, disabling the 'post' icon(and changing it's appearance) and generic error messages are not enough to let them know what they need to do to participate. I'm thinking something in the header area that would prompt you to register/sign in; and a different type of header is the forum is restricted to 'read only'. I'm probably doing a lousy job of explaining this, but I want more indications to help people understand why they can't post, or why they can't enter an area of the forum and easy paths to get them to registration.
