No, they're not making ABC's Lost into a comic book yet. But if you want to know about the Spanish comic that Walt is seen reading in a few episodes of the show, you can go here and see a summary and some page scans.
I paused a few times on the title last night, and I knew they had the old Flash (Jay Garrick? Do I have the name right?) in the first ep with OMGWTFPOLARBEAR. And I will admit, I wanted to go looking, but I don't have a lot of Flash or Green Lantern comics, so I really was just waiting for someone else to do the work. And so they have.