Traditionally hosting your monitoring environment in-house with nagios, zenoss or hyperic came with the requirement to have addtional servers. That is not only a burden on your IT budget but also for the environment.

Since monitoring is not your core business process it's pratical to find a monitoring solution that has the most technical deep-dive agents for problem determination and diagnostics as well as beneficial for the environment.

Searching for an optimal solution, software-as-a-service has proven we can help keep the data center footprint practical i.e. SalesForce.com. Here is the Q&A for monitoring-as-a-service