I assume most forum members use film either rarely or never. I am in the rarely category. But I did take my film camera (1N) on a recent trip to Europe as well as my digital (5D2) which I used most of the time. Main reason is there were a couple of spots I wanted to do timed double exposures and only my film camera has mutliple exposure capabilities. (I know some of the newer digital bodies have this and I would be curious to know if it works as well as film).
My technique was to do a first shot with some daylight left at sunset, underexposing a couple stops, then wait for the night lights and do a second shot for the lights on the same frame of film. The second place I used this, Dover Beach and Castle (England), did not come out as well as I had hoped. And the time between the first and second shutter click was much longer than I anticipated - two and a half hours. (I wanted to do the day shot before the sun went behind a big hill causing shadows). But the first place I used this, Notre Dame Cathedral (Paris, France) turned out exactly as I had hoped. It was only about half an hour between the first and second click. The first shot captured some blue reflections in the water and also the red glow in the lower clouds. Immediately after the second click I did another single exposure of the night shot to compare and there is no comparison. The double exposure blows it away.
I used Ektar 100 and it is amazing how good the latest 100 ISO films are. I enlarged it to 40x60 inches and it looks great! (Had the film scanned high res at the lab I work at http://www.jonesphoto.com/
Thanks for looking and I would be interesting in seeing other multiple exposure efforts (both film and digital).