One of my sites was hit by Panda 2.0, but has recovered at the Panda 2.2 update. (Held steady since June 16.) That's the good news. The bad news is I have no idea why, because I didn't touch the site, and didn't do any link development. (I was on vacation.)
Panda 2.2, according Matt Cutts, was designed to tackle the issue of sites that republish content being placed higher in search results than the original source. However, none of the sites which are now lower than mine in rankings copied my content. (I appeared on the scene much later than they did.)
I don't see any new links from other sites (checking Yahoo Site Explorer) that could explain the recovery.
Meanwhile my main business site is still in the tank. The main difference between the sites is the one that recovered has some much longer pages. But I don't know if that is what led to the recovery.
Did I get +1 love?