Panda Update 21

[suwunk]

Panda Update 21 is being unleashed on Google's results, one that it says will impact 1.1% of English-language queries in US; 0.4% worldwide.
source: Google Releases Panda Update 21, Impacts 1.1% Of US Queries In English

[suwunk]

Google's Matt Cutts announced that the Panda algorithm will be more of a rolling update, as opposed to what it has been as a manually pushed out update.
Google Panda Update To Start Being A Rolling Update

Panda updates are going to be more integrated and less noticeable in the future, What do you think about this integration?

[tima]

Only time will tell

If anyone is interested, seoMoz has a good list of algorithm changes. So if you notice any changes you can see if they line up with one of the dates mentioned.

Google Algorithm Change History | SEOmoz