I recently had the experience where I was attempting to get a night portrait of someone but still maintain some of the background. For example, getting an image of someone on top of Rockefeller Center in New York while also getting lights from the city below. Back when I had an old Canon film SLR, there was a setting where it would double expose a single picture, taking a longer exposure first for the background, then firing the flash for the second exposure to light up the subject. All done with a single click to minimize shaking.
Is this the best way to capture such a photo?
If so, anyone know how to do it on an Olympus E-PL1? It's got a setting for multiple exposures, but the only way to do this is to take a long exposure, pop-up the flash, take the flash exposure. This results in a good deal of shaking and seems like it's less than ideal for something that seems like a moderately common scenario.