According to Bryan Konietzko's Tumblr, the Legend of Korra cast has just finished up their commentary for the Legend of Korra DVD! Konietzko announced this on his tumblr around 4:28 PM letting the fans know! Here is what he wrote:

" Mike and I finished up the last of the Korra Book 1 DVD commentary sessions with Seychelle Gabriel (Asami) and Janet Varney (Korra) this morning. Hope you guys enjoy them! We have a lot of fun recording them "

If you haven't already, you can go ahead and check out the Legend of Korra DVD trailer. The actual DVD is available on Amazon for pre-ordering here.