When can I buy a Macbook with Leopard preinstalled? 10/26 at the Apple Store? 10/26 at any authorized seller? 10/26 online? Before then? DECEMBER? This is my first mac since I was in college and I have no idea what to expect. I appreciate any advice. If I have to wait, I figure go buy one now and get Leopard through up-to-date. SOOO excited!!