I use AT&T and this is definitely not a good thing for us as cosumers.  We need more competition not less and all these mergers acts against our favor. Now there's gonna be a large monopoly on communication too.  
AT&T Mobility is a GSM carrier. So is Tmobile and Nextel. Verizon is a CDMA carrier, so is Sprint. I bet they merge not long after this goes through. One more sad news for americans in this bad economy as there will be huge lay offs pretty soon.