This is just the thing you need to have in your camera bag. I have one that I bought online but if your not in a rush and have the skills to solder this would be a clever little device to have around. Very handy for tripping the shutter when your doing macro work or your doing long exposures where camera vibration is a bad thing.

This is a replacement for the sparsely available Nikon ML-L1 and ML-L3 IR remote controls. Like the original remotes, this very simple circuit allows you to remotely release the D70 shutter or do a bulb exposure while avoiding camera shake. It should also work with other Nikon (d)SLR’s, provided they are supported by the ML-L1 or ML-L3. The IR sensor of the D70 is behind the round black plastic spot above the D70 logo on the body.

[via steve]
Nikon D70 infra-red remote control