Los Gatos, Calif. - Imageshack, a provider of free and premium image and video hosting services for consumers, has raised $15 million in new financing from Sequoia Capital, VentureBeat reported, citing "a reliable source."

San Mateo, Calif. - AdMob, a developer of mobile advertising technology, announced that it has raised $15.7 million in its third round of funding, led by Sequoia Capital's Growth Fund.

Austin, Texas - Challenge Games, a developer of online fantasy sports games including "Duels" and "Baseball Boss," announced that it has raised $10 million in its second round of venture capital financing, led by Globespan Capital Partners.

Stockholm, Sweden – Stardoll, a teen and tween social-networking and doll dress-up community, announced on Thursday that it has reached 20 million registered members. This means that Stardoll has doubling its membership in just under a year, having announced the 10 million member milestone on August 23rd, 2007.

San Francisco - TokBox, a Web-based video communication service, announced on Thursday that it has closed a $10 million second round of venture capital financing, led by Bain Capital Ventures.

Redwood City, Calif. - Amobee Media Systems, a provider of mobile ad delivery technology, announced on Wednesday that it has raised an undisclosed sum of new funding, from investors including Motorola (NYSE: MOT), Cisco Systems (NASD: CSCO), Telefonica, Vodafone, Accel Partners, Globespan and Sequoia Capital.

Austin, Texas - Challenge Games, a developer of browser-based, free-to-play online games, announced on Thursday that it has closed a $4.5 million first round of funding from Sequoia Capital.

San Francisco - Mevio, a broadband entertainment network offering video, audio and music content, announced on Wednesday that it has secured $15 million in its third round of funding.

Mountain View, Calif. - LinkedIn, the creator of an online professional network with more than 23 million members, said on Wednesday that it has secured $53 million in its fourth round of funding, which values the company at just over $1 billion. Bain Capital Ventures led the round, which also included previous investors Sequoia Capital, Greylock Partners and Bessemer Venture Partners.

Mountain View, Calif. - Confirming earlier reports, Web-based messaging and chat service Meebo announced on Thursday that it has raised $25 million in new financing, led by JAFCO Ventures.

San Francisco - Music-focused social network Imeem has raised an undisclosed sum of new funding from Sequoia Capital, Tech Confidential reported.

Mountain View, Calif. - Bubble Motion, the developer of a platform for voice messaging and advanced voice content applications, said on Wednesday that it has raised $14 million in a new round of funding.