This saturday I did a session at Office 365 Saturday: Monitoring SharePoint usage and Performance using Application Insights.
The session went ok, but demos weren't that exiting, since Azure Application Insights (which is still in preview) were down during my session. I knew they were doing updates on the service, so I took some screenshots.
Please find my presentation and PowerShell/JS used in demo in this zip.
I also made the presentation available on SlideShare.