Las Vegas - Vlingo, a provider of voice-powered mobile phone applications, announced on Wednesday that it has raised a $20 million second round of financing, led by Yahoo (NASD: YHOO), which will also offer Vlingo's voice-powered technology on its mobile oneSearch service.

Mountain View, Calif. - Skyrider, a developer of monetization technology for peer-to-peer networks, has raised $5 million in new financing, from previous investors Sequoia Capital, Charles River Ventures and Velocity Interactive Group, VentureBeat reports.

San Francisco - Dizzywood announced on Friday that it has raised a $1 million first round of funding, which it will use to help launch its 3D virtual world and online game platform for kids ages 8-12.

New York - Millennial Media, a provider of mobile advertising services, announced on Monday that it has raised $15 million in second round financing, led by Charles River Ventures.

Mill Valley, Calif. - SocialMedia Networks, a provider of tools for developers building applications for online social networks, announced on Thursday that it has raised $3.5 million in its first round of venture capital financing, led by Charles River Ventures.

Beijing - WangYou Media, a Web hosting service for blogs, video and other content in China, has raised $6.12 million in its second round of funding, PEHub.com reported, citing a regulatory filing.

Cambridge, Mass. - Conduit Labs, a developer of online games that marry social networking and virtual worlds, has raised $5.5 million in its first round of financing, from Charles River Ventures and Prism VentureWorks.

San Francisco - Twitter, a social networking and blogging service that uses mobile phones, instant messaging and e-mail, said that it has raised an undisclosed sum in funding, from Union Square Ventures, Charles River Ventures, and angel investors including Marc Andreessen, Dick Costolo, Ron Conway and Naval Ravikant.

Boston - Eons, an online social network targeting users over 50 years old, announced on Tuesday that it has raised $22 million in its second round of venture capital financing, led by Charles River Ventures.

Cambridge, Mass. - iSkoot, a provider of mobile Internet communications technology, has raised $7 million in its second round of venture capital, led by Charles River Ventures.

Needham, Mass. - Bus Radio, a provider of radio broadcasts targeting school buses, has raised $10 million in its second round of venture capital, according to a report in Private Equity Week.