If you are looking for religious information on the web you can not do any better than going to the Wabash Center. They have a list of Preaching Related links as well as a list of Preaching Syllabi that is regularly updated.
What is the New Homiletic and how has it affected homiletics? This book by Fred Craddock is often referred to as the book that started a big change to the homiletic horizon. As I read it today many things sound almost axiomatic due to the strong influence of the work.
The Rev Dr. Renita Weems has a website entitled Somthing Within. The website is specifically directed to thinking women of faith.
Dr. Tim Sensing of Abilene Christian University has compiled an annotated bibliography for preachers that you can obtain at this link.