Details here ~
http://www.mydish.com/perks/free-preview/
Announcement says "four days" but dates indicate Saturday to Monday (9/15 - 9/17). I suspect they meant Friday (9/14) as a start, but we will know more in a couple days, I guess . . .
Fire up that DVR and get ready for some Dishy goodness. Many customers are qualifying for half-price premiums of late so you may wanna ask a CSR about that if you are interested in keeping them for a while . . .