It isn't an impossible dream. There are regular jobs available at McMurdo base and Scott Base and they need IT staff. I know two people who spend 6 months or so every year working down there and they are addicted to it, constantly drawn back to the beauty. They have a lots of amazing stories.
You can also of course just make the trip as a tourist.
That sounds interesting. How did your friends go about getting those jobs? It sounds like the kind of thing i'd do. I'd prefer not going down their as a tourist; I'd rather be involved in something if I were spending time there.