Where I work, we constantly switch between Linux, Windows and Mac OS X machines. We use a lot of external hard drives which mostly come preformatted as NTFS. This is a problem because Mac OS X by default cannot natively write to NTFS, and the third party apps that can tend to mess up Bootcamp.
Does anyone know of a single file system that can be read from and written to by every operating system? Please don't say FAT, as Mac OS X tends to mess up flash drives formated in FAT.