Hey All,
Quick update here... so for those who felt there wasn't enough differentiation between the post bit and the post section (too white), we made a little tweak that is subtle but helps a lot.
On the left side of the user post bit above, we added a vertical lightly shaded blue line. It's very subtle -- you may not have even noticed it -- but it seems to be enough to help give that extra structure to the thread as you scroll down so you can quick pull out the comments from the user info.
We did play around with going back to a darker color/shade of grey in the user area of the post, but as soon as we do that it really kills the clean/modern look and it just looks old in comparison. We think this is a happy medium.
Looking ahead, we still have some big forum upgrades coming and we're going to continue to work on improving things. Those changes will be tied to our CMS upgrade though (can't just slap them on the existing site), but looking at some of the feedback I think that next set of changes will really make everybody happy.