Check out Kairos Journal, an online journal designed to help preachers with research. The genius of this site is the interconnection between four "quadrants" of material on any given topic: biblical reference, historical precedents, quotations and writings, and current trends. Resources are also divided topically into eight large categories: church, corruption, economics, education, family, government, sanctity of life, and virtue. Mind you, this is not an archive of cute stories! It is a well-ordered compilation of thoughtful essays and quotations on a myriad of contemporary issues.