Peace in Sudan?

Apparently they've negotiated a "permament ceasefire" in Sudan:

Sudanese government and southern rebel officials on Friday signed a permanent cease-fire deal and endorsed a detailed plan on implementing a series of agreements to end a 21-year civil war in southern Sudan.

Clearly, this is permanent as in "not temporary" (the latter being the type of ceasefire where everyone gets a chance to collect their wounded and re-arm). My hope is that this ceasefire really is permanent; my suspicion is that it will be as temporary as any other ceasefire that region has seen.