(context: While SBC and BellSouth Corp. are focused on helping combine AT&T Wireless with Cingular, which SBC and BellSouth co-own, SBC might not be finished. )
What does "SBC might not be finished" mean, esp. the word "finished"? And what does "while" mean here? I don't know the logical relationship between the first part of the sentence and the last part of the sentence.
SBC might not be finished doing what they plan to do in that area.