It says the sale ends the 26th, but it is still on the front page of the site. When I tried to add things to the cart yesterday it did not make the 2nd item free. www.dvdpricesearch.com says the sale ends on the 28th. You can always call to double check.
Looks like the sale is still on. I just put 2 of a random sale item in my cart and it applied the BOGO. If the discount doesn't show up for you automatically, enter code BUYONEGETONE in the coupon box, and it should discount the free one.