We have several macs in our household. My wife and I both have separate itunes/mac app store accounts. I'm guessing I will need to pay for 10.7 twice? With itunes you can have multiple accounts on a computer. As long as they are under different user logins. What about the app store if it's tied to the actual OS of the macs admin account? Plus like many others here, I have concerns over my options to do a full erase and install of lion. Looks like you have to start from a scratch 10.6 then update to 10.6.7. So you can jump to 10.7.