Jason,
Your first question goes along with
this post
. Once we get Like's going, Comments will be easy as well. So let us investigate that first.
For posting to Facebook, there *should* be a checkbox that says "Post this Comment to my Wall" or something like that in the comment area. If you're not seeing that, or it's not posting properly when checked, let me know and I can look into it further. Ultimately though, that functionality is completely controlled by Facebook, so there's only so much we may be able to do.
Thanks,
Alex