saidar: a program I've been searching for

I've been looking for a program that would be a top-like program (ie would display a screen of information and refresh every couple seconds or so) but would give an overview of an entire system. In particular I've wanted something that could quickly narrow down the question: "Why is this server sluggish?" Traditionally I've had to use many tools to check whether the problem was CPU, Load, IO, Network, etc. So while doing a completely unrelated search (using `apt-cache search` for programs dealing with swap) I came across saidar and it seems to fit the bill nicely. It displays information about processes, memory, disks, and networking in an easy to read and digest format. It's not perfect and I might offer some suggestions to the developers but it's the best thing I've found so far for the purpose I have.