I am closely following the secession of Southern Sudan. It is a very intriguing situation – the birth of a new state.
Information is scarce about this topic. The Sudan Tribune provides some insights, but most quality coverage is done by Al Jazeera here. Some facts to consider (quoted from here):
Eritrea, Libya and Iran have already stated they won't recognize Southern Sudan as a state. Most western countries probably will, as plans are persued to open embassies in Juba. (Juba has just been getting a new international airport – I wonder how much fuel they keep on stock to operate it just with generator power?)