'Cascade' is a popular variety for brewing.  Bred at OSU, it is a great general purpose flavor and resistant to downy mildew. 

Hops are a wonderful choice for summer shade screen and, of course, for beer making.  They grow vigorously with enough sun and water.  We reccomend growing them in post unless you are very certain of your long-term location because they take a bit fo work to completely remove from the soil.  They prefer to grow up strings, and will grow over 20 feet tall if they have a strong and tall trellis.  We have about five plants that grow up our west-facing porch to provide lush shade all summer long.