mine seems to have developed a clunk- though I'd call it more of a loud click- too. I don't hear it all the time- only the first time I apply the brakes after the car has been sitting for a while (usually at the end of my driveway).
I also have a rattle in the back- sounds like maybe exhaust hanger or something- only hear it over really rough/holey spots. can't wait to have that diagnosed- last time I had a loud clunk, in my F150 pickup, I got it back and was told "it was a quarter in the seatbelt buckle m'am"
boy was I irritated with the little woman routine.
took it back the next week and took the mechanic out for a ride. he says, 'oh yeah, the shocks are loose"
went back that evening to pick it up and was told "it's safe to drive now but you have to bring it back next week for parts on order"
the main cross axel bolt had come loose and was hanging by a thread! it had enlarged the hole, and they had to specially gasket it to fix it. oh yeah...quarter in the seatbelt buckle.
told the service manager about the quarter thing and he got really embarrased and gave me a free oil change. (axel thing was warranty)
I'll guess I'll wait till the 10,000 service to discuss it with the mechanics.......