How come this only gets a 3?

I use netapp's at work and for anything where I didn't have an unlimited budget I'd use opensolaris with zfs.

For a turn key solution based on the same technology perhaps you should check out nexenta which is a commercialisation of opensolaris and zfs to solve the problem at hand here...

No I don't work for them.. but I've used it and it's cool. :)

http://www.nexenta.com/corp/

We wrote a php/oracle calendar for our university and migrated all users (30 thousand plus) to it (previously we were using netscape calendar).

We also wrote a palm conduit for it for pc and mac..

It has been in production for over a year now with many thousands of users using it every day.

We were going to open source it but havent because of how oracle centric it is .. we really should have used pear to not be oracle centric.