Hello, I have few questions: 1.If I buy the Air now, before Mountain Lion is released, how do I upgrade? Will it cost me any additional money? 2.I am new to Mac, so if I do upgrade, how all the process of reinstalling the operation system works if I decide to do so? will it install the original operationg system (Lion)? 3.If I buy a mac online and I live in AK, will I have to pay taxes, and if so, how much? Thank you all.