http://research.microsoft.com/SearchDefender/ Very interesting to see this project at microsoft aimed to kill forum, blog spammers to gain high ranking in search engines.
Yeah, probably because they reward web spam more than any other engine right now. Google has more experience fighting web spam and probably has as many if not more projects going on to kill spam, but Google would rather not talk about it if at all possible because they don't want people to realize that Google results are polluted as well.
It was interesting reading. I posted about it yesterday (in the wrong place) but it is fynny to see that they have a pge where they show spam results in Google found in May but still in googles index