Plaxo, Inc. is introducing Plaxo 3.0, a major new release of its “smart address book” service, offering an online address book and calendar that synchronise between Microsoft Outlook, Google, Yahoo!, AOL, Mac OSX, Thunderbird, and mobile phones.

The new version bridges between multiple disparate tools and services with automated, multi-way synchronisation, and is available for free in seven languages including French, German, Japanese, Portuguese, Simplified Chinese, and Spanish.

Todd Masonis, Founder and VP of Products says it took a year to develop this new service. “Plaxo 3.0 is the platform upon which we can build out our ‘sync and share’ vision, giving people access to all their data wherever they need it, and enabling ever richer ways to stay connected with the people who matter in their lives.”

The platform gives people access to all of their contacts and calendars at work, at home, or on the road. It offers a wide range of access options, including a new web interface; native client software for Windows and Mac OSX; and several mobile options, including a new WAP 2.0 version for mobile browsers, available at m.plaxo.com.

The new online interface to Plaxo is a rich AJAX web application, with multiple components, presented in a seamlessly integrated, interactive environment.

Users can synchronise a variety of information, depending on which service is being used:

- Google (starting with Calendar, with Gmail coming soon)
- Microsoft (Outlook, Outlook Express, Vista Mail, and Hotmail)
- Yahoo! (Mail and Calendar)
- Mac OSX Sync Services (for Address Book, iCal, iPhone, and more)
- AOL (AIM)
- Mozilla Thunderbird
- LinkedIn (available as part of Plaxo Premium)
- Mobile phones