Ugly news for the company’s workforce, which has already seen its headcount reduced by 4,600 this year as part of a reorganization of AT&T’s shrinking landline business.

Shares of AT&T (T), which have dropped by about 30 percent this year, slipped another 2.7 percent in pre-market trading.

“As wireless network quality improves and unlimited calling becomes increasingly pervasive, we expect the trend toward wireless substitution to continue,” Alison LeBreton, vice president of client services for Nielsen Mobile, said in a news release. “In a tightening economy every dollar counts, and consumers are more and more comfortable with the idea of ditching their landline connection.”

An interesting trend and one that seems likely to continue as landlines become more of an extraneous expense. The average landline phone household spends $40 a month for that service–$480 a year. Cut the cord and you save yourself a few hundred dollars to spend on something else.

Like booze. Because according to another survey, this one from The National Center for Health Statistics, wireless-only adults enjoy getting liquored-up far more than their landline-loving brethren. From the survey:

The prevalence of binge drinking (i.e., having five or more alcoholic drinks in one day during the past year) among wireless-only adults (37.1 percent) was twice as high as the prevalence among adults living in landline households (16.9 percent).”

(Photo courtesy Justin Hancock)

The company’s first-quarter earnings met Wall Street expectations today thanks to strong growth in its wireless and FIOS home fiber-optic services businesses. With a 10% increase in first-quarter profit, and revenues that rose 5.5% to $23.83 billion, Verizon’s business would appear to be more recession-proof than others. “We’re really not seeing a change in trends,” Chief Financial Officer Doreen Toben said in an interview. “How many people are really going to drop their wireless phone?”

Not very many. Verizon added 1.5 million subscribers to its mobile business during the quarter. That said, there are plenty of folks willing to drop their landlines. Verizon wire-line subscribers declined 8.2% to 40.52 million from 44.15 million in the first quarter of 2007.

“For example if you live in London, for just 2.95 euros a month, you can call your grandmother in Poland, whenever you like, talk for up to six hours at a time, and not worry about how much it’s costing you,” explained Stefan Oberg, VP and GM of telecoms at Skype. “Your grandmother doesn’t need to understand the Internet. You just use your Skype subscription to make the call and she just picks up the phone.”

An interesting move, and one that comes just days after incoming eBay CEO John Donahoe said the company will consider selling Skype at the end of the year if it can’t find ways to use it to support its core business. “What we’re testing this year are the synergies,” Donahoe told the Financial Times. “If the synergies are strong, we’ll keep it in our portfolio. If not, we’ll reassess it.”

While consensus has long held that the synergies to which Donahoe refers are anything but strong, that may be changing. Last week eBay reported earnings, noting that Skype added 33 million subscribers in the first quarter of this year, boosting its total membership to 309 million. Revenue also hit $126 million, up 61% from the same quarter last year.

Still, the Silicon Valley start-up, which officially opened its Web-based telephony platform to third party developers this morning, is generating a lot of buzz for its Flash/Flex-based telephones (see video below), and rightly so. The company has essentially built a software version of an operator-class telephone switch that connects Internet-based voice communication services with mobile and landline phones and other Web-based phone applications.

Using its Ribbit API, developers can write applications that support full telephone capabilities–voice mail, call-logging, text-to-speech transcription services, etc.–and because they’re Flash/Flex-based, they can be embedded into Web sites and integrated into Web-based services.

“What we have done is made voice an object that you embed into your workflow (or software),” said Ribbit CEO Ted Griggs. “We didn’t want to change how people did things, like communicate via Skype, and wanted to integrate the platform to work with any phone.”

Smart, eh? But how’s the company going to make money? Ribbit says it plans to charge for services like calls to traditional landlines, voice-mail transcriptions and billing. A reasonable plan, but as Ovum analyst Brett Azuma notes, an unproven one. “Unless there’s a foolproof way to get the products out there and make them successful,” Azuma told Wired. “I think the consumer applications are a little unclear for now. Being able to use text-to-speech transcription services and archive voice calls are many of the features that consumers have shown interest in over the years. However, whether or not they’re willing to pay for these features is going to be the big question.”