If they do that would be great, but between the 2 i would go with google instead of msn since they have a broader range as far as search engine footprint
MSN has proved to be not as creative and powerful from ad publishing viewpoints like the way Google and Yahoo are.
think msn's program isn't very effective. I hardly know anyone who uses live.com. Probably most of the advertising is done on the msn messenger chat application lol.
Yes Microsoft is coming with the thing like this very soon here is the link http://advertising.microsoft.com/publisher/sls but there are many restrictions for that i think, so let them grow and make us all publishers grow with them.
Once i signed up with godaddy hosting plan , i got credit for microsoft some sort of program like adwords . The thing is don't remember the name. so yes , they do have one . But I would say it's not very popular.
Microsoft has a beta publisher program that is only open to the US right now. http://advertising.microsoft.com/publisher