I think unison is too "heavy" for my purposes. I need not to work with CVS or SVN, also all files may be considered as binary (i.e. no patches based on their content, files must be just replaced with newer).
I thought that I can make a list of files on one computer (with find/ls/stat or so) and feed this list to the tar on other computer to make an archve with new files. Is this possible?