www.Christianity.com
I use this site for my daily bible reading schedule and it has alot of other great stuff. Daily devotions by popular Christian teachers and video articles to tough questions by Scholars and sound bible teachers.
www.desiringgod.org
This is Pastor John Piper's site and all of his sermons are free. Most of the recent stuff is streamable in video and audio. You can subscribe to his podcast if you do that and his books and small group material is available there as well.
