I've decided I'm going to be switching to a Mac within the next 2 months. I'm still going to be using Windows via BootCamp a lot. I want to have a partition that has read/write access for both windows and OSX. I know what your thinking format it to FAT32. I occasionally deal with files larger than 4GB. So FAT32 would not be ideal. And I don't trust 3rd party drivers like MacDrive or PARAGON. I just discovered that Vista and Windows 7 can format partitions to UDF via the Command Prompt. How will OSX handle UDF harddrives and partitions?