This is a really good introduction to the different levels of infrastructure monitoring and their various pros/cons. http://librato.com http://librato.com (ful

This is a really good introduction to the different levels of infrastructure monitoring and their various pros/cons. http://librato.com http://librato.com (full disclosure: I hack there) is a startup with a new kind of entry in the process-level monitoring/management space. Would love any feedback the infrastructure-minded part of the community here might have.