My '08 F brakes started squeaking soon after it was broken in and haven't stopped squeaking since (~15k miles now). When I informed the dealership (Park Place Lexus in Plano, TX) none of the mechanics knew what to do so they told me they contacted Lexus, who said it was normal for high performance brakes to squeak....and yet my buddy's '09 M3 doesn't have the problem nor does the '06 S4 of another friend. One of the dealership mechanics even told me that I should try to slam on the brakes at a fairly high speed to get rid of the squeaking - didn't help.