Is that your own script, or a modified template for Wakaba? If the latter, maybe you should make it available, it is pretty neat-looking.
Although two things spring to mind: Maybe the Name and Email should be on the left, and maybe the frames are a bit superfluous. Then again, maybe not.
If you ever need to add verification, how about stuffing it in together with the post button somehow? They seem sort of logically connected. And it looks a bit lonely all by itself.