Backup solutions wanted

I'm looking to backup, or sync, two identical 1TB drives.

One is in this pc at /media/disk-2
The other in my file server at /media/sda1

I have ssh installed on both machines and can manually copy stuff over, 
but I want it to happen automatically as a cron-job

I've tried unison-gtk but cant get it to work ( crashes without error 
details ) and I'm not clever enough to write a script myself :(

Does anyone know of a simple backup/sync app that works on ubuntu 8.04 
64bit?

cheers
chris