They did 50 updates in March which included the Panda version 3.4, would check SEOMoz/search engine land and follow them on twitter for latest updates.
I read all 50 updates... But never go in technical details. I suggest to remember what SEO is for. 1. Do Perfect On Page (Keywords Selection need to be Perfect) 2. Just build Quality Links..,,, No one can stop you..
You might want to go thru these http://insidesearch.blogspot.in/2012/04/search-quality-highlights-50-changes.html