Discovery Channel Store offers the Discovery Channel's Planet Earth: Complete Collection on Blu-ray for $34.99. Apply coupon code "EML2008" to cut it to $29.99. With free shipping, it's $8 under last week's mention and the lowest total price we've ever seen for this title. (Be sure to select "standard shipping" at checkout to get free shipping.) These sets include all five episodes from the Discovery Channel documentary hosted by Sigourney Weaver (not Sir David Attenborough like on the original BBC version) and some bonus footage.