The Ninth Working Conference on Grid-Based Problem Solving Environments brought together researchers and practitioners interested in the use of numerical software in a distributed setting. This note summarizes some of the successes and challenges in working with numerical software in a Grid environment. This is not a comprehensive list of the contributions in the meeting; rather, it provides one person's impressions of the common themes and issues. In addition, some items were noticeable by their absence, and a number of these are discussed here. Opportunities for future work also are described.