This might interest some of you.
http://www.amahi.org
A PXE-enabled version of Personal Backup Appliance is integrated in the Amahi home server product.
I've been running an Amahi home server on real hardware in my home for a few months, and it's what I use exclusively for backups.
Here are some links to get started. The Amahi Project is actively seeking volunteers to deploy the Amahi into their home.
http://wiki.amahi.org/index.php/Fedora-7
