For the HD addicts out there, a lot of the new HD channels that DirecTV is adding are available and up and running now, including Discovery HD, Science HD, the Weather Ch. HD(yes, it does look good enough to make you sit there and watch), History HD, Smithsonian HD, and many others including the newly launched Big Ten Network.
http://www.directv.com/DTVAPP/global/contentPageNR.jsp?assetId=P4360044
http://www.directv.com/DTVAPP/global/contentPageNR.jsp?assetId=P4360044