From Lior Fainshil:
SETI Monitor is a free program that monitors the activity of your SETI@home client. It shows the signals found and saves results from completed work units. It is optimized and has no effect on SETI@home performance. Clicking on any of the signals of the graph now displays a window with a description of that signal. It shows graphs of gaussians and can identify some strong peaks.
You can see a screen shot here.