I recently purchased a Macbook Air 11.6" 128GB and I realized my itunes library is getting a bit bigger than expected. So I searched for ways to keep my MBA`s SSD with more space and I found this article.
I do have an 1TB external HDD connected to my airport extreme, and ive been transferring files mannually. But this solution seems quite interesting! having my itunes library all stored up on it seem cool!