The fan seems to be failing on my MacBook Air, it has become loud and every now and then goes into spasms. I think I'm going to need to get it replaced, although I'm going to buy a new MacBook Air as soon as the new models arrive so will try to delay replacing the fan as long as possible (NAB will have to be my deadline). It seems that the fan has just worn out - it doesn't surprise me given the fact it runs on full blast half the time on the Rev A MacBook Airs. Does anyone have any idea what the cost of replacement is likely to be? Also, for anyone who has had an issue like this before with any laptop, any ideas how long the fan will continue to function after it starts making weird noises etc?