#1. "RE: D50 + SB-700 adequade extension cord" In response to Reply # 0
You have several choices:
Current offerings -
SC-28 cable - simply an iTTL compatible extension cord - locks securely to both hotshoe and flash - about 3' in length.
SC-29 cable - same as SC-28, but offers an IR AF assist light on the end that connects to the camera - this disables the IR AF on the flash. The advantage is that if your flash is sitting in a bracket (usually to one side), the IR isn't pointing directly at the subject.
If money is tight, you might be able to find a used SC-17 on the market. It's still compatible, but it's missing nice things like the posi-locks on the hotshoe and flash.