I need backup software for a home network.  Mix of Linux and OSX 
machines.  Will be using an external HDD for backup media.  The backup 
server will run on one of the OSX machines, since it's the only 
non-laptop I have.  I'm mainly looking for something that's easy to 
configure and has minimal resource consumption.

I've read a bit about BackupPC and Bacula.  So far, BackupPC seems 
preferable because it looks much simpler.  (No client software to 
install.  Cool!)  I'm interested in any opinions about these 2 packages, 
or recommendations on other programs I ought to have a look at.

thanks,
alex