And now, they're putting on the finishing touches. (This is not to underestimate the potential for continuing conflict over Abyei Province or anything else, of course.)
As the link notes, they've asked for their own international calling code, which will be issued after UN recognition, and their own top-level domain (TLD: the Internet country extension). They've asked for .ss, which has led to comment since it reminds people of the Nazi SS, but it is of course intended for South Sudan. The Reuters story at the link shows they do, indeed, know this already. (Sudan's is .sd.) Not all TLDs are obvious: .ch for Switzerland, .ie for Ireland and .ae for the UAE all make a certain amount of sense (in Switzerland's case if you know the country's name in Latin), but aren't intuitive. Obviously, .ss would be easy to remember, and .ss would be far from the only potentially embarrassing abbreviation. I have some good friends in Bermuda and am always mildly amused that the email addresses end in the slightly unfortunate .bm, though perhaps they can lord it over the Bahamians, whose TLD is .bs.