I'm noticing a slight improvement in a Penguin-hit site since November 12. I don't know if it suggests an algo update - it could be there was more than Penguin wrong with the site and I've fixed something. The change is (a) that for one short-tail keyphrase I'm inching up position by position, and for a number of very relevant long-tail searches, I'm finally seeing some traffic (meaning, these are phrases that strike me as "that page should ALWAYS have been getting traffic for this phrase; why didn't it until now?")
All good changes IMO, if very modest. Anyone else seeing anything like this, or is it just me?