Nursing Informatics is a specialty of Medical Informatics (referred to in the broader sense as Health Informatics or eHealth) and deals with the support of nursing by information systems in delivery, documentation, administration and evaluation of patient care and prevention of diseases.
There are a number of opportunities available if you have either a strong nursing background, or significant computer programming knowledge (or both).
The latest nursing informatics jobs can be found at informatics.hirenursing.