Just more for curiosity at the moment but has anyone got 2 installs running in parallel? I was thinking of install 1 on ISP 1 and install 2 on ISP2, one install being the live and the second being a backup. In the event one system or ISP goes down you could re point access to the other (fail-over). Not sure how easy it would be to automate synchronisation of the user database though. Not really given it too much thought yet but wondered if this has been done by anyone.