Hi! I am thinking about plunking the down the hundred dollars to have access to the mountain lion developer's preview, and I had a few questions I hadn't seen answered elsewhere... 1. When the final public release of 10.8 happens in the summer, will I be able to upgrade organically from the developer's preview (without losing all my data, etc.), or will I have to downgrade to Lion or restore the system first? 2. Actually, I also want to confirm that the dev. preview will install over my current lion and (assuming nothing whacks out) retain my data, yes? 3. If I do get the preview version, will I still have to pay the (likely) $30 for the final version? (I imagine yes.) Thanks!