I have a few mainstream sites I launched a few months ago and they were getting top results in msn for the most highly searched words I was targetting. Sadly last week that changed
Too bad because the sites that are showing up now are even less relevant than mine were.
I only said positive things about Microsoft's engine in the past because I was getting some nice keyword traffic from them for a while. Other than that they are fucking shit. They really have a long way to go.