Bush Honeysuckle (genus Diervilla, variety unknown).
Lovely flowering hedge, very little scent, beautiful white to off-white flowers during springtime. In town and well-maintained, these are a regional heirloom-variety hedge plant and provide great bird cover. Out of town, or otherwise left uncontrolled, they'll spread like crazy and are a horrible nuisance to get rid of -- so you'll find them term "invasive" used liberally.
More info here: http://www.nps.gov/plants/alien/fact/pdf/loni1.pdf