This is CactiView, a very simple PHP script that just continuously rotates through a certain set of graphs that we decide are important.
The big image is the last 12 hours, then in the top right downwards: Weekly, Monthly, and Yearly. In the bottom right I put the current time (UTC) and in EST. The header in the top right displays the current graph and the next graph in the sequence.
There are two of these screens in our office, and also two monitors that display our systems status from Nagios.
CactiView is now available for download from my blog: laurie.denness.net/blog/2009/12/cactiview/