If you keep an eye on the forums, I am sure you will know within hours of it being made available The more you ask doesn't mean the quicker it will happen!
I spoke to some MSN guys at SES in London. They should be launching in the UK towards the end of the year. They're starting trials with some of the big companies in a month or two. It doesn't sound like they have plans to roll out across the globe in a hurry. Japan and more European countries will be next. That means the sun will not set on the Google empire for quite a while still.
Its better to test things properly before rolling out !! Yahoo ads didnot impress me much !! Lets see if MS can give google the much needed competition ...