I like to do this:
http://tad1214.homeunix.com/
http://tad1214.homeunix.com/uptime.html
135 days is my current record.
I formatted it better about half way down.
Also all shutdowns were due to power outage, hardware upgrades (new hdds installing tonight), or relocation. I have never had my server crash on me ever, or rebooted for software/OS reasons. This is a Samba/MySQL/WWW/SFTP/FTP(closed right now, no use for it) server running 6-Stable until tonight when it will be running 7-stable, oh yea, Sparc64, so even non main stream architectures are stable.