BITSAdmin
If you are doing much development with BITS, then I suggest you download the BITSAdmin tool. It comes with Vista and the XP SP 2 Platform SDK, or you can download it in a smaller tools pack. It gives you complete command line control over BITS, which is really cool.
You will also want to write a utility to clear your Queue of dead jobs that will get left behind as you are developing. Trust me, you will need it.