'''PBA backups''' don't seem possible with default Mac OS X 10.x BIOS, so maybe running Netboot server on HDA would help somehow. Probably not helpful with backups, but at least letting, say, a Macbook network boot would be really cool.
* [https://www.math.ohio-state.edu/wiki/administration/macosx/netboot/bsdp_with_isc_dhcp Mac OS X BSDP Service using a GNU/Linux Server]
* [http://etherboot.org/wiki/howtos Etherboot howtos]
*[http://www.sysresccd.org/ system rescue cd] might be able to boot it, then let PBA take over
* I also wonder if some sort of VM could be run on any client and that would help run some more complex rsync incrementals.. hmm