VoIP: A Shot in Telecom's Arm The Internet telephony marketplace is sizzling hot these days, with traditional phone carriers hoping to fend off cable firms and a host of other upstart rivals.  All the buzz prompts the question: Is telecom back? &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/B&gt;&lt;/FONT&gt;