There is this tool called Google, it is fairly new I know but what people don't know is you can use it to search for tons of interesting facts and information.

For Example:
Google Algorithm Change History | SEOmoz

It is call the EMD update. All the EMD domain that is optimized has been penalized and drop in ranking. Only some of the EMD that is not over optimized still ranking high.

I think panda, penguin and EMD punishments are latest in Google algorithm.

EMD is the latest punishment I guess. But EMD still worth to rank now.. I can see EMD is still ranking high.

Google's last updates was EMD that's Panda 20 th , that's all.

Only low qulity EMD's was affected. If you have a site called fishing tips and people search for fishing tips, and your webiste got quality content, then Google will not punish you.