.
I agree, you dont need to shoot at lower f stops at night, but if you need a fast shutter speed and have the ISO cranked all the way up then theres not anywhere else to go that I know of, which takes you to the poorer end of quality with the kit lense. Could be wrong of course, I am most definately an ammateur, picked up most of my knowledge from interweb forums and ebooks
Actually if you are doing stationary shots you use a very slow shutter speed (to absorb more light) and a very low ISO (as nothing is moving)
For reference I am talking night shots of statcis setups such as the shot in his signature. Also a tripod is paramount for night work.