Jagger 3

Jagger 3 is pretty much rolled out in Google. Look for lots of shakeups in the rankings. My sites seem to have improved but time will tell. The search engine that has been the best for my sites has always been MSN, but Google is the most popular one so it's good when my sites improve there.
Take a look at http://www.webmasterworld.com/forum30 and http://mattcutts.com/blog for more detailed info.
If you find sites that clearly should be ranked where they are in Google fill out a Spam Report at http://www.google.com/contact/spamreport.html