I'm a recent iPhone owner and, needing to install software to give me an internet gateway for my laptop when travelling, I jailbroke it. This meant that I could also install other non-Apple-approved software like Cycorder to make movies using the inbuilt camera.

So, having travelled to Sydney, I took advantage of a wait for a train to give Cycorder a workout in a less well lit place - Museum Station on Sydney's underground rail network. From memory, I think the iPhone/Cycorder combination can do 12 to 15 frames per second.

The result isn't too bad.