Vlingo, a startup that specialize in providing voice-powered user interface is announcing a whopping $20 million in a round B financing. This round was led by Yahoo!, joined by existing investors Charles River Ventures and Sigma Partners. According to Vlingo (PDF), they’ll use the capital to fuel international expansion and continue its product research and development. As part of the deal, a Yahoo! nominee will join the company’s board. In December 2006, Vlingo also received $6.5 million in Series A financing from Charles River Ventures and Sigma Partners.

Vlingo has a pre-existing relationship with Yahoo!, as they are the provider for the voice recognition for Yahoo!’s oneSearch mobile search service (PDF). Many startups are trying to invent new technology to improve the existing mobile technology arena in the face of disruptive technologies and trends. Vlingo has a distinctive mobile speech technology whereby users are allowed to speak their queries instead of writing text formats on their mobile phones. The integration of Vlingo into Yahoo!’s oneSearch will help to bolster mobile search services particularly when users can speak their queries into the search box prepared by Yahoo! oneSearch.

Vlingo, Ma.-based, was founded in 2006, having just launched a beta version of its voice-powered interface in August last year and was named as one of IDC’s “Ten Emerging Mobile Players to Watch” in this year.

You can visit the Vlingo-enable Yahoo! oneSearch at http://m.yahoo.com/voice.