Re: Combined Register + Post
A basic register-then-post would probably be relatively easy using AJAX on the post-form template, without having to touch core files. Modifying registration email behaviour as described earlier in the thread would probably be more difficult. Problem is of course, bbPress support forums are filled with people who want people to write things for them and almost no-one willing to do it.
That said mind you, I’d give the first part a shot if I could get my head around the kind of form layout you’d need to use.