The watches offer news, sports, weather and stock quotes, among other snippets of content, via Microsoft's MSN Direct wireless data service. Twice the number of information channels of earlier Microsoft-based models are available.
Known as the "Paparazzi" line, the computerized Swatches also offer local entertainment updates through a deal with publisher Time Out, as well as a chance to meet celebrities.
The watches come with three levels of service. Each comes with free local weather, news headlines and stock-index levels. For $40 a year, users can receive more weather data, personalized news and sports scores, stock quotes, horoscopes and the like. For $60 annually, they can receive instant messages and calendar reminders from their PC if they use Microsoft Outlook software.
Microsoft and Swatch began work on watches three years ago.
"This is a new way of getting information," said Bill Gates, Microsoft's chairman and chief software architect.
Paparazzis retail for $150, or two to three times the cost of conventional watches sold by the Swiss watch maker