The Australian Army is still desperate for people with IT skills. Yes, first and foremost you are a soldier and there is always the chance of having to go into combat. However, I would argue that the chances of you doing so as an IT professional working in the Army would be slim - they'd need you to be doing the tech stuff because that is your primary area of training.
Originally posted by salvelinus
I don't know about Australia, but in general, if you join the military, as opposed to being employed by them, you'll do what they tell you. You may get programming training, or not, and you may actually work at programming, or not.
You stand a good chance of getting what you want, seeing as it's computers, but you never know. Some in the US joined under promises of certain training/jobs, but instead got posted as a radar operator in the Aleutian Islands. They sued & lost.
You also have to be willing to kill and die. Hopefully wouldn't come to that, but it's always possible.