A lot of companies (us included) use MaxMind to help prevent fraud. MaxMind will help greatly in identifying open proxies, geolocations for high risk countries and distance from billing address, etc.
Very good post!
If you use Observium, do consider purchasing the professional version for the newest version and bug/security updates. http://www.observium.org/subscribe/
For more information on the version differences http://www.observium.org/wiki/Edition_Split
Pingdom has a great android and iPhone app. With the right vibration overrides you can make sure you always get sound alerts for important notifications.
Hello,
My name is Brian from Stealthy Hosting in Seattle, WA, looking to offer any insight I have into the VPS market. :) We do not sell VPS servers directly but I work with many owners of VPS companies within our network and always like to keep up to date.