Backing up to Networks
You can easily backup to any local network volume that can be mounted on your desktop. Just select or drag the destination volume into the destination filed in the main window and you ar good to go.
Networks: Backing up to non local Networks such as AFP ,CIFS (SMB,) NAS, an airdisk, or Time Capsule types of non HFS+ file systems may have unpredictable results due to the fact that they don't handle file permissions and other attributes that rsync uses to compare files with. Copying personal files may work OK in these situations, or not at all, depending on the type of setup. It is often possible to copy files to these Networks but incremental backups may not work properly, each time copying everything instead of just the changes. Incremental backups do work, sometimes, when "pulling" from the destination rather than copying to them, especially with an airdisk attached to Airport Extreme. System clones will not work at all.
BackupList+ will provide the right options for rsync to function correctly on network volumes in most situations.
Note: You can not make System Clones to a non Mac file system. You can however make a clone to a sparse disk image on that network volume. You can restore your system from this but can boot from it.
Using the rsync option "--size-only"
This modifies rsync's "quick check" algorithm for finding files that need to be transferred, changing it from the default of transferring files with either a changed size or a changed last-modified time to just looking for files that have changed in size. This is useful when starting to use rsync after using another mirroring system which may not preserve time stamps exactly. Note: you will need to do this in the "expert options" settings panel and must understand how to set up the string of options for rsync to use. See Expert options for more...
Remote backups?
I am working on this at the moment and can help you set up a remote backup over ssh using backupList+. If you are familiar with the Terminal application it is easy to do. The next release of backupList+ will hopefully have this feature enabled to make it easy for users to do.