The problem with that shutter speed on lenses without IS is that you will get a blurry image (that's the beauty of IS
). What do you mean with shutter speed vs aperture? But in low light, you want to open your aperture as wide as it can (unless you're after a desired affect for instance front to back focus) to get the shutter speed as low as possible, and the 1000D should perform ok on the ISO front so don't be afraid to crank that up. I'm an amateur just as much so I'm still learning
Another thing with the top one is (one that I need to nail into my own skull too!) composition, you cold perhaps zoom in with your feet a little more and remove the fence from the frame but also wait until the guy on the left has gone that would create a much nicer image.