The Boring Stuff
The Unix utilities button brings up a number of tabbed functions in a dialog box.
Choose the plutil tab to check your preferences for corruption. The man tab is actually a reference guide to Unix utilities because it displays the manual for a selected utility. This is awfully useful for the infrequent Command Line In Terminal user because the syntax and options used with utilities is always important but sometimes poorly remembered. The man tab is a great "cheat sheet" for most of the Unix utilities, so you can use them right the first time.
The locate tab will find a file for you, even if it is invisible in the Finder. The system_profiler tab gives the same information as Apple's, but a tad faster. Not much excitement there.
The Info button on the toolbar is just as boring. You can find the same information from the About This Mac menu and system profiler, but everything is aggregated into one dialog box.
So, when does the good stuff start?