I'm wondering if there is any online service which keeps incremental backups from a server incrementally.
I'm looking at Mozy etc. but I'm not sure if they offer this service.
I basically need a backup service for RackSpace Cloud sites. I do not want to use PHP etc. to push the backups. I would like the service to auto-pull files etc. Something like subscribe and forget in terms of service.
It's a bit out of date but see the links at http://pushsite.sourceforge.net/readme.html#if (NB pushsite itself is intended to run on the files to be copied - not the mirror, but if you feel like doing some Perl programming it would not need a lot of changes).
Project Gutenberg recommend (amongst others) mirror for maintaining a replica of their content.