laptopmd - 2:12 pm on Dec 15, 2011 (gmt 0)
I'm having similar problems (I work with a laptop repair company in New York City) and it appears others are as well: [bing.com...] -- with our site being removed from SERPs but not totally ignored by Bing.
Bing is still crawling my site and from what I can tell I haven't necessarily been blocked.
I originally thought the fluctuation was because of a site relaunch in early November but as time wears on and resubmitting sitemaps and double checking redirects yields zero results, I'm wondering different.
Even doing a site search in Bing shows a few results (interesting thing is that Aussie site shows different than Bing USA) which leads me to believe that we haven't been completely removed.
Our Bing traffic has dropped to zero but we are still being consistently crawled and indexed though at a slower rate.