I think so - I was originally going to bootcamp XP...but considering the majority of apps I need are on OSX (hence the reason Im converting from having a PC and MBP to MP and MBP) it would be annoying to have to reboot to go to XP for 1 or 2 programs.
Also, as I read, if you create a raid in OSX (purely software), if you boot into XP via bootcamp you wont be able to read it...and thats where my working files will be (videos, image sequences, etc).
So if I VM XP (itll prolly always be open, just cause MSN for win kills anything thats out there for mac that supports MSN), I want to be able to access my RAID.
So yeah...basically...I want to be able to create a VM of XP with Fusion, and within that VM, be able to read and write to all volumes available to me in OSX (internal HDDs, software RAID, external HDDs).