Network synchronization of serialized files

[jeweladdict]

lets say i have 2 computers socketed together with tcp/ip these two computers both have a file called file.bin both computers can add to the file as they want... all new information will be stored at the end. at the end of the day, i want the files to be merged, with the end of one file, being the start of the 2nd, and then this new merged file gets placed on both computer harddrives replacing the exisiting file.bin with the new merged file.bin. is there a utility out there that does this? (kinda like CVS?) is there a function that would let me merge two serialized binary files of the same type? (meaning same serialization class)