For many years now, I have been capturing vmstat output and displaying it in a graphical LAMP solution. It can load quickly into various graphing images that can be easily pulled down to your computer to annotate, or attached directly into emails.
The page above shows many servers, one after another, in an easy-to-view stream. Each line of graphs represents one week, so that one can quickly learn “the story” of how a server has been performing over time. Memory leaks and i/o waits are especially easy to spot. But the interface is also flexible enough to handle other data, provided that it is saved in the correct format.