We are thrilled to announce the next three experts participating in TechCrunch50. Joining Marc Andreessen, Roelof Botha and Marissa Mayer as TechCrunch50 experts are Ron Conway, Sheryl Sandberg and Yossi Vardi.

	Ron Conway Ron Conway is one of the Internet’s pre-eminent angel investors. He was the Founder and Managing Parter of the Angel Investors LP funds whose investments included Google, Ask Jeeves, Paypal, Good Technology, Opsware and Brightmail. Ron was names #6 in Forbes Magazine Midas list of top “dealmakers” in 2006. Ron currently on investments with Baseline Ventures, an early-stage venture capital firm. He is an active advisor for a number of Internet companies and also very active in community and philanthropic activities, including Vice Chairman of UCSF Medical Foundation in San Francisco and co-chair of the “Fight for Mike” Homer and Creutzfeldt-Jakob disease (CJD). Crunchbase profile.
	Sheryl Sandberg Sheryl Sandberg was named COO of Facebook in March 2008, and she manages business operations including sales, marketing, business development, human resources, public policy, privacy, and communications. Prior to Facebook, Sandberg was Vice President of Global Online Sales and Operations at Google, where she built and managed the online sales channels for advertising and publishing and operations for consumer products globally. She was also instrumental in launching Google’s philanthropic arm. Sandberg was previously Chief of Staff for the United States Treasury Department under President Bill Clinton. She was also a management consultant with McKinsey & Company and an economist with The World Bank. CrunchBase profile.
	Yossi Vardi Yossi Vardi is an Israeli entrepreneur most famous for being the original investor in ICQ - the first Internet-wide instant messaging system. Vardi has invested in over 50 tech companies in diverse areas of software, energy, Internet, mobile, cleantech, and others. Vardi has been an active civil servant in Israel through projects involving energy and infrastructure. He also co-founded Alon, an Israeli oil company. Vardi acted as an advisor to the World Bank and the United Nations Development Program on issues of energy in the developing world. Vardi has received many awards including The Prime Minister Award, The Industry Award, Entrepreneur of the Year (Tel Aviv University), and the CEO!’s Entrepreneurs Hall of Fame from the Collegiate Entrepreneurs’ Organization. CrunchBase profile.

Yossi and Ron participated with us last year as experts. We are honored to have them joining us again this year. Likewise, we could not be more excited to include Sheryl in this year’s expert line-up, to bring her Facebook and Google perspective to TechCrunch50.

Stay tuned as weekly announcements about experts and panels will be forthcoming, in addition to more surprises along the way.

We’re pleased to announce the first three experts for our 2008 conference: Marc Andreessen, Roelof Botha, and Marissa Mayer.

	Marc Andreessen Marc Andreessen is the co-founder of Ning, the create-your-own social network platform company that has raised over $100 million in funding. He also serves on the board of Open Media Network. Marc is best known as a co-founder and chief technical mind behind Netscape Communications Corporation and co-author of Mosaic, the first widely- used web browser.
	Roelof Botha Roelof Botha is a partner at Sequoia Capital focused on services and software investments. Prior to joining Sequoia Capital in 2003, Roelof served as the Chief Financial Officer of PayPal (EBAY) and worked as a management consultant with McKinsey & Company. Roelof is a certified actuary (Fellow of the Faculty of Actuaries), has a BS in Actuarial Science, Economics, and Statistics from the University of Cape Town and an MBA from the Stanford Graduate School of Business.
	Marissa Mayer Marissa Mayer is VP, Search Products & User Experience at Google. She joined Google in 1999 as Google’s first female engineer. Her efforts have included designing and developing Google’s search interface, internationalizing the site to 100+ languages and launching numerous features and products. Several patents have been filed on her work in artificial intelligence and interface design. Before Google, she worked at UBS research lab (Ubilab) and SRI International. Marissa has been featured in various publications, including Newsweek (“10 Tech Leaders of the Future”), Red Herring (“15 Women to Watch”), Business 2.0, BusinessWeek and Fortune.

Marc, Roelof and Marissa were experts at our inaugural conference last year, and they lead very lively panel discussions with our presenting companies. We’re thrilled to have their leadership support again this year.

We’ll be announcing more experts on a regular basis over the coming weeks. Stay tuned.