Matt Cutts has been on a roll by providing tons of good information for SEOs to chew on, probably for the next two months. He came out with a interview with Mike Grehan the other day, and last night he was live on WebmasterRadio with Danny. Also last night, he posted one of his most detailed explanation of what the heck is going on with BigDaddy at http://www.mattcutts.com/blog/indexing-timeline/.
What I recommend is that you read the whole thing, not once, but twice - if bid daddy has affected you. You will also notice there are 106 comments already in that post, I don't know how Matt handles it all.