Dulles Aviation sounds familiar. I flew into Newport News last summer. Solid IFR from NC onwards..fun! Yes, the K1 allows you to work. I believe you will get a 90 day work authorisation when you enter the USA (and must marry within 90 days of arrival). You have to get a one year one afterwards ASAP. INS take ages to do stuff over here. It took me 4 months to my work authorisation.