What is this tree/shrub, long white flower clusters? *Photos*?

I have a tree or maybe large shrub (?) growing along my driveway, and am wondering what it is? It has lots of pretty white clusters of flowers.



http://i211.photobucket.com/albums/bb250...

http://i211.photobucket.com/albums/bb250...

http://i211.photobucket.com/albums/bb250...



Flower clusters:

http://i211.photobucket.com/albums/bb250...

http://i211.photobucket.com/albums/bb250...

http://i211.photobucket.com/albums/bb250...

http://i211.photobucket.com/albums/bb250...



So... Any idea what it is? =)

What is this tree/shrub, long white flower clusters? *Photos*?
It appears to me to be a young cherry of some sort. If it is, if you look closely at the leaf petioles (stems) you should be able to see small glands: http://departments.bloomu.edu/biology/Ri... An example of cherry blossoms on a wild black cherry: http://www.missouriplants.com/Whitealt/P...



Privet is more tubular with 4 petals: http://www.flickr.com/photos/jim-ar/4874... and the leaves are opposite - yours look alternate.

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