I'm new to the Mac family. i still have a Windows XP machine on my home network that has alot of my writing fils on it. The trouble is, I like to type on my mac and my pc, but it's frustrating to have to copy the files over to one another every time. I've found some programs that will sync, but i want one, preferably free, that runs in the background and automatically saves to the other machine whenever I save to the other. Is such a program out there? Thanks for the input!