I just checked my FreeNAS RAID. This is a personal RAID I use to store backups, installers and VMs. Here is the original post : http://fortysomethinggeek.blogspot.com/2012/08/freenas-low-power-amd-e-350-lian-li-pc.html .
299 days uptime for a home box. Not bad. The last time it was rebooted, I needed to move it to a different location.