@DanQuest
If you want to limit the domains of search results you can augment your query with the Bing advance search operators NOT and SITE: as illustrated here:
http://msdn.microsoft.com/en-us/library/ff795633.aspx (NOT)
http://msdn.microsoft.com/en-us/library/ff795613.aspx (SITE:)
For example, to query the term "XBOX" but exclude domains XBOX.COM and XBOX360.COM, set your querty term to:
XBOX NOT (site:xbox.com) NOT (site:xbox360.com)
Here is that query from the regular Bing Search Engine Results Page
http://www.bing.com/search?q=xbox+NOT+%28site%3Axbox.com%29+NOT+%28site%3Axbox360.com%29+&qs=n&form=QBRE&pq=xbox+not+%28site%3Axbox.com%29+not+%28site%3Axbox360.com%29+&sc=2-48&sp=-1&sk=
Here is that query from the regular Bing API Offers on Azure DataMarket
https://api.datamarket.azure.com/Data.ashx/Bing/Search/v1/Web?Query=%27xbox%20NOT%20%28site%3axbox.com%29%20NOT%20%28site%3axbox360.com%29%27&$top=50&$format=Atom
The queries above issue a request for "XBOX" but exclude all results that have the domain xbox.com or xbox360.com
Thanks
Lester