For flowers or other expressions of support to the people of Spain, the address is:
His Excellency Inocencio Aris
Spanish Embassy
2375 Pennsylvania Ave. N.W.
Washington, D.C. 20037
Phone (202) 452-0100
For a list of Spanish consulates around the United States, click here. (via Dean Esmay, among others). Update: Glenn Reynolds has photos and eyewitness accounts of demonstrations of support for Spain in Washington, D.C. (more net reaction)
