AWS Missing Tools

http://code.google.com/p/aws-missing-tools/

Amazon AWS has some great monitoring tools for your cloud instances and other parts of your AWS cloud infrastructure. However one notable missing out-of-the box feature is the ability to monitor disk usage of your instances, something crucial for reliable large-scale deployment.

However it turns out there is a way to add custom metrics, including disk usage, that incorporate smoothly into your AWS monitoring dashboard: