This week the results of Southern Sudan's referendum were released and as expected they were overwhelmingly in favour of seccession. However, the soon-to-be fledgling state is not quite out the woods yet. There remains alot to be done before July when the coutry will, under the terms of the CPA, formally become an independent state.
There are a number of interested legal questions that have been thrown up by this process that remain unanswered (and unexplored), and many more will surely emerge over the coming months. For an excellent discussion of some of them see "Referendums Today: Self-determination as Constituent Power?" by Stephen Tierney, which responds to "Let his People Go: Sudan’s Lesson for Secession" by Timonty Waters, over at EJILTalk!.