Firefox 4 will feature Bing as the third option in its search bar. The mozilla blog gives a preview of how it will look, and says

Google remains the most popular general search and it will remain as the default search option, unless you change it. We will also continue to include Yahoo! as the second option for general search. Yahoo! has a loyal following and continues to provide a differentiated user experience, even as it integrates the Bing engine for its algorithmic search results. Bing itself offers a user experience that we think users will find valuable, and with its significant rise in popularity over the last year, we will also be including Bing as a general search option for English language users.
Interesting, looks like Microsoft is finally gaining headway in the search engine wars, especially since it will be controlling Yahoo results too.

Anyone have any tips or tools for SEO with Bing?