Microsoft’s bing search just went live. Below is the XML you need to create a OpenSearch format based Firefox add-on to include bing in Firefox’s list of search engines:
<ShortName>bing</ShortName>
<Description>bing search</Description>
<InputEncoding>UTF-8</InputEncoding>
<Image width="16" height="16" type="image/x-icon">http://www.bing.com/favicon.ico</Image>
<Url type="text/html" method="GET" template="http://www.bing.com/search?q={searchTerms}"></Url>
<moz:SearchForm>http://www.bing.com/</moz:SearchForm>
</OpenSearchDescription>
Create a file with the above contents (make sure to join lines that have been split), name it bing.xml, stick it into C:\Program Files\Mozilla Firefox\searchplugins and restart Firefox — now you have bing in your search list.