Hi there , I have a question about the Lion license that will be available for purchase in July. At home, we have three computers with OSX. Two of them are running Snow Leopard and a third one, Tiger. One of them belongs to my wife and the other two are mine. My question is: How many licenses will I have to buy? (At the keynote I heard that one copy per user should be enough, but I'm not sure what that means). Also, Will I be able to upgrade from Tiger to Lion or would I have to buy Snow Leopard too? Thanks for your help!