The National Digital Stewardship Alliance is a member organization whose mission is to establish, maintain, and advance the capacity to preserve our nation's digital resources for the benefit of present and future generations. From October 3 through October 31, 2011, the Content Working Group conducted a survey of organizations in the United States that are actively involved in, or planning to start, programs to archive content from the web. The goal of the survey was to better understand the landscape of web archiving activities in the United States, including identifying the organizations or individuals involved, the types of web content being preserved, the tools and services being used, and the types of access being provided. This summary report examines participant responses for the purposes of discerning trends, themes, and emerging practices and challenges in web-based content acquisition and preservation.