I have the 15" unibody which I'm happy with. Of course, I'm envious of the refresh. But what I'm wondering are the real hardware limitations of the current notebook. Namely RAM. With Snow Leopard supporting a theoretically huge amount of RAM, is my hardware limited to the 4GB, or will Snow Leopard let me upgrade to 8GB? Or will I have to upgrade to the new body? I mean, the screen is great and the battery life is awfully tempting, but practically speaking, upgradability is a lot more important. So the RAM is kind of the deal breaker. Do I need to upgrade or can I just wait for Snow Leopard to come out and run and update my software?