Just an fyi the "&output=embed" is just being ignored by Bing Maps, they don't have that option best I can tell. You are embedding the real Bing Maps page, the same one if you just went to the link.
The way to make Bing maps embedded is here:
http://www.microsoft.com/maps/isdk/ajax/
But its complicated Javascript and only works based on latitude/longitude... there is no way to put a street address ans get and embedded map.