My feedback so far:

1. I would un-clutter the post/reply page. Get rid of the "Instant Graemlins" and UBBcode stuff.
2. I liked the old post icon dropdown box rather than the radio buttons that are there now. Again, less clutter.
3. I think listing the number of people viewing a particular forum is distracting and doesn't add that much value.

Those are my biggest gripes so far, overall things look pretty good.