Design of the Heroku Status Site
blog.heroku.com
blog.heroku.com
Here are a few others that I like. (Incidentally, AWS page isn't on the list. I'm a massive advocate of AWS, but they flat out lie for most of their incidents. http://status.aws.amazon.com/ )
------------- Good Examples ---------------
CloudFlare - https://www.cloudflare.com/system-status
Desk/Assistly - http://www.desk.com/trust
ZenDesk - http://www.zendesk.com/support/system-status
37Signals - http://status.37signals.com/
Heroku - https://status.heroku.com/ (In case you skipped the article)
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If you want a public status page, a company called Nimsoft, (I have no affiliation with them), provide status pages as a service.
They produce pages like this one : http://status.automattic.com/
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Also, if anyone is interested in how Heroku did the cool connect lines between events on the timeline, and then the actual description, there is a working proof of concept here.
Demo: http://status.twilio.com/
Project Site: http://www.stashboard.org/
Source: http://www.github.com/twilio/stashboard
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The already mentioned nimsoft seems to be a highly used service. It is currently used by twitter, google, wikipedia, mozilla, amazon, apple mobileme.