I had read some basic things about how in Leopard Apple had included the ability to re-partition hard drives without completely erasing them. Essentially, they had included a GUI for gparted – at least that’s how I get it.
Last night I had decided to expand my Data partition, but tonight I had decided to completely erase it and re-claim the disk space. This works great. I was able to boot off my Leopard disc, launch Disk Utility, and remove the Data partition and not lose my Macintosh HD partition. And it was a cinch to put everything back on because of Time Machine. This is all wonderful and has made my night a whole lot easier.