just want to give away a tips of nice machine for making backups and also as a dev server at home or for small org/firms.
I have bought it my self and its working fine with a good Qnap community that make better and better firmware for upgrades.
You could also install Joomla 1.5.1 from scratch and have this as a dev server. If you want to know more here is a link.

http://www.qnap.com/pro_features_Joomla.asp