poacher69, we crawl the public web. Anyone that blocks us out with robots.txt, we won't crawl. If you check bing.com/robots.txt, it has "Disallow: /search" . So no, we won't crawl Bing's search results pages. If anything, users tend to complain when search results from Lycos or wherever show up in Google.
I was gonna call out Matt for crawling bing's search results but I'm guessing Microsoft hasn't realized they return results from the /Search/ folder. ;)
