Ridiculous fan noise - iMac 21" 2011

Hey folks,
I have a brand new 2011 iMac (Core i7/1TB/4GB) 21" which i got at the start of July. The fan is making a really weird noise - I've never heard anything like it before. It sounds like there is a cricket stuck inside or something - its really loud and tends to get louder or quieter all of its own accord.
I'm pretty sure it needs a new fan but I'm in Belgium and they don't have official Apple stores here. There is a reseller close to me - can they do these repairs?
I recorded the fan noise just in case anyone has heard anything like this before. I know I have heard a few laptops make a noise like this right before the fan dies but I cannot afford to lose my iMac right now.
http://dl.dropbox.com/u/9498863/Memo.m4a is a link to the recording.
Thanks folks,
SJ

So I downloaded smcFanControl and ramped up each of the fams seperately. Turns out it was the HDD fan the was casuing the noise. I fired it up to 6400RPM and the noise stopped instantly. However after some more testing anything below about 5000RPM (which is annoyingly loud) yeilds the high pitched noise.
I have no idea what to do about this now...

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