I have the 2011 MPB and obviously it is running Snow Leopard. I hear that Lion will be released this summer. I have a few questions; 1. Do you always upgrade to the latest edition of Mac OS X? (will you be buying Lion?) 2. On the Apple store you can buy Snow Leopard for 29, if it is the same for Lion, will you get the option to do a fresh install or is this just an upgrade of Snow Leopard keeping all your files & apps in place? 3. How many licenses do you get with the DVD? (Or is there even a license with it?) Thanks!