Yeh, I know that's a sticky issue. To me, the "East" is part of the housenumber. Like, the street is "1400 North" and the particular building is at "555 East." But other people don't see it that way, and in other states they commonly see the "East" as part of the street name. Martijn told me once it was bad form to put alpha characters in addr:streetnumber, so I avoid putting "500 East" or "500E" in that field. 