Just subscribed to this site, because if Panda has taught me anything, it's that it was a mistake to focus solely on user experience and content and ignore Search Engines. That what I did in the past, and I lost heavily in Panda, my site was on the Sistrix list even though we pretty much do nothing but long form content.
By my reckoning, what Panda really is, is Google telling webmasters that Content doesn't matter and that all that really matters is paying closer attention to what they want.
Still have no idea why we were hit, but have been working frantically to try and find any improvement possible. We've done most of the things people have reported here, and can so far report absolutely no change.
Nor have I heard from anyone who has seen any real change outside of the two sites already listed here.
John Mu's post on the Google forums seems to suggest we won't see any change either. Starting to think this is just the new reality and people should start making plans to go out of business or lower their expectations to stay in business in this new reality ruled by eHow and sites like it.