The flavor profile of a BDN is much different than that of classic bubbly in that you will get more "berry" in the nose and mouth, usually leaning towards strawberries (real, fresh strawberry, not strawberry flavoring, which is heavier and more candy-like), and raspberries or cherries. This style of wine is not "sweet," but will definitely be more fruit-forward and highly aromatic. In some instances, you might be able to pick up a hint of smoke from the Pinot Noir, adding a bit of complexity to the wine.
The Domaine Chandon Blanc de Noir pictured is one of my favorites and has the honor of being the Sparkling wine served at all White House receptions, but there are many other brands that are (IMHO) just as yummy! Try the Gruet BDN from New Mexico, it's about $15, instead of the usual $20 for the Chandon...
MORE INFO & REVIEWS:
88 pts Wine Enthusiast: http://wineshop.chandon.com/chandon-blanc-de-noirs-p2.aspx
90 pts Wine News http://www.wine.com/V6/Domaine-Chandon-Blanc-de-Noirs/wine/511/detail.aspx
RECIPE FOR A SPARKLING MARGARITA!