The document summarizes a report on 80 public Web 2.0 companies. It finds that the companies have a combined market cap of almost $25 billion and include a variety of sectors like gaming, social networking, and media sharing. On average, the companies have a market cap over $300 million and annual revenue of $100 million. They also have high profitability with an average EBITDA margin of 17.6%. The report provides analysis of these companies' recent financing activities, industry news, and valuation metrics.