I recently put a 120GB NTFS (5.1 - XP) Formatted drive into my G4/Panther machine and it was auto-mounted, although I must say that not all my data was there. An entire ~30gb partition of mp3's was missing, in this case not important so I just grabbed what I wanted and wiped the drive.
So just pop it into your mac and give it a go, if all your stuff isn't there, you can always network (if you have a Windows box that is)