Three Separate Drive Partitions on Mac

Hi,

I'm not sure if this is the right section to be writing this, but I'm looking into getting a MacBook or MacBook Pro this May, (don't ask about waiting, I can't so I'm going with the C2D version), and upgrading to 160GB hard drive. I still need to run some Windows programs so I need to utilize boot camp, but will mainly use Mac Os X. My question is has anyone ran the partition manager at startup, and set up three partitions, one for Mac Os X, one for Windows, and one for Data to be transferred between both? I have been doing some research, but so far I haven't come across anyone who has done this. If you have or have any information about it, please let me know.