At AllClients.com, our engineers track our service uptime every minute of every day. This monitoring service (Pingdom) alerts our staff of any downtime, as well as creates some nice summary reports. We are now making this data public to keep us even more on our toes!
We’ve very proudly had 99.98% uptime since we started this monitoring service in 2009. (And 95% of the 0.02% downtime has been our weekly scheduled, late-night maintenance)
You can dig into the stats here, at any time: http://uptime.allclients.com/