Merging Phone Companies

There are some reports that SBC is in talks with AT&T about a buyout. Reports are stating the buyout could be worth as much as $15 billion. It seems to me that lately many phone companies keep merging together. If you recall a few months ago, Cingular bought out AT&T Wireless. With companies merging like this, is this good for the economy or are one or two companies going to control the market and have their way with the prices and force the consumers to pay too high prices? What is your opinion?