File/folder synch with modem connection?


I am considering switching from PCs to Macs by year end. One significant function I currently have with my PCs is the ability to connect from one location to another and 'sychronize' files between select folders on the two seperate computers. The program I use actually determines which of 2 files in the seperate folders is newer and then copies the newer file in the appropriate direction.

Q: Any feature in OSX that can do that? Any other suggestions for additional software to serve that purpose?

Timbuktu won't do it.
'FilesynchronizerX' by Softobe apparently will not work over a phone line.

Thanks for any help.