The newest art for Hacker was done by JediMasterWithAPen. It was done as a cosplay of three parts for the part of the story where L is trying to figure out Light's password. Hope you guys enjoy:
Here is a piece done by Dex Jerkon Ahme.
This is a link to a picture of L that Super Goat Grl has done for Hacker of the Past.
Here is a companion piece of art that Super Goat Grl has done for Hacker, this one of Light/Kira.
This is a link to the animation "Matt vs Kira" that call-me-H has done for Hacker of the Past.
Lastly, is another art piece by call-me-H has done for Hacker showing various moments of the story.