wheel - 6:12 pm on Oct 13, 2011 (gmt 0)
I'm in the beta program for that, and unfortunately, they just don't have the advertisers. At least not for my niches. It's been a few months, but every now and then I let the MSN ads run for maybe 10k impressions or so, and it ends up a total fail.
Which is a reminder to us all to get out and advertise on bing - not much competition.