I gotcha. I don't have that model of White Macbook. The model I have is from March, and it's a model that isn't sold as a White Macbook anymore. I have the model with the 2.4Ghz dual core CPU. Which is sort of my dilemma for getting the Aluminum Macbook. For the most part, I would be going down in CPU speed, unless I push more money into the bigger model. That's nice and all, but the price gets kind of close to the 15" Macbook pro so I figured, I keep this model and then get a pro.
On the other hand, I'm really happy with this macbook, but I know I'll grow out of it and want more power. It's my workhorse and I often demand what it can give me. However, I still want any of my future notebooks to be small and light so no more 17" for me. I have a PC laptop that size with which I hate moving it around. It's basically an easier to move desktop, but too heavy and large to really move places with it.
So logically, if I want to keep the CPU power, and do an upgrade from what I have, I need to go Pro. (Thankfully Pros now have the ability to match the Macbook battery life, by effectively turning their graphics hardware back to Macbook standards)