We recently started using the Bing API after finding Goolge's search not working out for our needs. I was able to get a demo prototype working with the api. My interest is gathering the results from a search using the "site:domain.com" to pull pages that Bing has cached.
I'm getting descrepent results between the API call and a regular search on Bing. First I do a search on: site:silvatechsolutions.com (in the main search engine). That seems to work great and I get a lot of results.
The same API call does NOT return the same amount of results: http://api.search.live.net/xml.aspx?Appid=YOURAPPKEYHERE&sources=web&Web.count=30&query=site%3Asilvatechsolutions.com
I only get 3 results total. The weird thing is, it seems to work on a few other domains but the two that I tested (and the sites have been up for a few years without major changes) have this issue.