Yesterday I downloaded and purchased Marine Aquarium. I'm enjoying it so much I wanted to be able to start the screensaver without having to wait for the usual screensaver delay.
Today, I created the simplest and tiniest (15k) of utilities - StartScreenSaver which will launch my screensaver immediately. I figured others might like a copy of this utility too so here it is. (I've included the full Delphi source code in the zip file - all three or four lines of it.)
http://www.users.on.net/johnson/startss/