Sounds to me like a loose connecting rod, control arm, or the like. Somethin up front. Maybe you threw a bushing or somethin. Get the car in the air, and take a look.
While its up, grab the front drivers side wheel at 3 and 9, and try to move it. Then, grab the wheel at 12 and 6 and try to move it. There should be ZERO measurable movement during this test. Repeat test on other side of car.