The Community of Science (COS) Funding Opportunities Web site describes itself as the most comprehensive source of funding information available on the Web, with more than 23,000 records that represent over 400,000 funding opportunities, worth over $33 billion. Users can search the database, which is updated daily, by simple keywords, sponsors, locations, requirements, citizenship, funding type, and much more. Other helpful features include being able to save and track searches and the ability to submit a funding opportunity of your own. The easy-to-use search features and time saving potential of the site make it a must visit for any researcher or other seeking critical funding sources. [JAB]