Sermons worth hearing

Bob Flayhart:
http://www.ompc.org/templates/cusoakmountainpres/details.asp?id=32227&PG=xCast&LID=687&func=&Style=


Tim Keller:
(Mostly text -- you have to pay for sermons)
http://www.monergism.com/thethreshold/articles/bio/timkeller.html

John Piper:
http://www.desiringgod.org
http://www.desiringgod.org/ResourceLibrary/
http://www.desiringgod.org/ResourceLibrary/Sermons/ByDate/