MSN has spent millions to reinvent itself as Bing and has spent millions advertising its new search engines. The result has been an increase in traffic to their search engine. Although its numbers are still diminished when compared to Google, they are still impressive. And many b2b companies utlize Bing more than they do Google.
I've spent years utilizing MSN adcenter. With the transformation into Bing, they present a great value for marketers. One of my search marketing services is to help choose which platform or platforms are best for your marketing dollars.