Clunk noise, underneath car while braking Options

[uberschall]

when it rains...

i just noticed last night that i'm getting a "clunk" noise from the front end (seems like passenger side?) when i coast, brake, and come to a stop. it's rotational...doesn't seem to be there (or at least as noticeable) when the car is in neutral.

i can feel it through the floor and brake pedal. a passenger confirmed that it's coming from the front.

everything looks ok from the outside, and there doesn't seem to be any play when i yank on the tire.

i just got the stupid thing running again last week after a crippling two-week ignition problem and $400.

...it pours.