Actually, Olympus was the first DSLR to offer the ability to "live" tether a camera w/changable lens to a computer, although most of the Nikon and Canon DSLR cameras can be tethered to offer an "after-shot" screen capture. I have my D80 connected to a laptop via USB to get a larger view of studio shots.
As for your camera, if there is no way to attach to your computer via USB into a program that will allow "live" picture, you can use your video cable to connect to a monitor (or laptop w/video input jacks) for live view.
DC