From their press release: "The true power of universal widgets lies in deploying applications across all platforms that can leverage the user's social graph wherever it goes." said Freddy Mini, CEO Netvibes. "By combining Netvibes UWA's cross-platform compatibility with OpenSocial's many social networking partners, we're ushering in a new era of universal, social widgets that enable true platform independence and exponentially more powerful social applications."
The video below (no sound) appears to show a weather widget and users commenting about the weather across platforms.