Noticed a huge spike in Googlebot activity, even higher than early July when the last Panda update came.
Anyone else seeing this? IMHO this is a pretty good early warning signal that a significant update is in the works as every time we've seen this spike it has been followed by a big update.
In the interest of helping answer questions--
Impacted by first Panda, improved with the past few Panda + Penguins