After booting up my pc the day after I realized that I'd set my system BIOS to boot my secondary drive.. much to my relief after switching back to the other drive I was warmly greeted by the Grub boot loader
While I was unable to complete a successful install of FC3 (using the cd's I burned from the iso's) I was able to perform an upgrade after installing FC2.
I'm not sure if anyone else has run into this scenario. But if you're having a problem making the switch you may want to try an upgrade instead of a clean install.
StarSage