DuckDuckGo uses more than just Bing for it's search backend [1], however I wonder if their other sources are enough to compensate for the potential loss of Bing.

[1] http://help.duckduckgo.com/customer/portal/articles/216399-s...

This is an important lesson about basing your business on someone else's APIs.

I am confident, however, the folks at DDG planned for events like this.