Do you have any idea what bush this is? It its unbelievably fragrant right now.
This appears to be a member of the Elaeagnus (olive) family, based on the flowers' intense (some say sickening) fragrance and the speckling (known as scales) on the leaves. The grayish foliage is also a popular feature.
Some plants in this family bloom in spring, such as the horribly invasive Autumn Olive or Russian Olive which produce tons of berries that spread everywhere..
Fortunately, however, some bloom in the fall and are not invasive here in Maryland. One possibility for your shrub would be Elaeagnus Ebbingei. Here's a link to some info: http://sammysplantworld.com/index.php?route=product/product&product_id=70