Same Here
I have been suffering from the exact same problem for the last two weeks. So I called up Apple Tech Support where I was told to turn my MBP in (after getting really mad at two ignorant, incapable and unfriendly Tech Support geeks who later forwarded me to second level support; just after letting me stay on the line for 35 minutes). Additionally, Apple's tech support via phone is not even free over here.
There, I was accused of just being picky. By the way: I am on my fourth MBP, as two of the previous ones had really bad hardware issues (loose, skew keys or a severe frame problem - the display was wobbling). No American or German assembly worker would have committed such a crime, guess you can blame that on Apple's quality control in China (which I highly doubt is even existing at all).
Thus, I got into my car and drove to the closest Apple service provider, who happens to be 80 km away (I live in Germany, in the center of Europe, everything is supposed to be close over here) from my place. The other choice would have been to arrange a pickup and wait for a 10-working-days-repair (which I cannot afford). The whole trip took me three hours (traffic, parking space issues; and the gas happens to be not inexpensive over here); all that just to turn in a two month old $ 3000 MBP (what the heck???)
The tech guy in Munich (who happens to be not affiliated with Apple, though being a licensed Apple repair agent) was more than capable, disassembling the MBP quickly and telling me that the sound was due to a rotten fan and a misfunctioning logic board (Apple has been issueing new MBP logic boards with new system restore discs for the last two weeks by the way), which has to be replaced.
He told me that he has been doing his job for the last twenty years and never ever before did Apple perpetrate such low quality work. Furthermore, he stated that every second MBP is turned in with a logic board failure.
The reason for this longer article is the fact that I am so mad at Apple. I just switched, but I am annoyed beyond recognition.
If I would just have bought one of those crappy Dell plastic boxes, I would even have in-home repair service (with Dell, the word deserves its actual meaning).