Sidereel has different links, most reliable is megavideo. The only thing is that there is a time limit on megavid, they force a 75 minute intermission. Just search deathnote, select, it will bring up a list of the 39 episodes, click search links and just go through links that work. When you click play, another window will open up, just close the new window and hit the red arrow to watch. First link...
http://www.megavideo.com/?v=WYNYCF70
They are also available on Netflix and HuluPlus
Hope this helps!