This Saturday, May 6, is Free Comic Book Day. I recommend Amelia Rules!, but there’s a good assortment of comics available. The site has all the information you’ll need.
Johnny Ryan has guest-edited the latest issue of Vice magazine. There’s more info on it here. Vice magazine is not for everyone, but he’s assembled an interesting group of people. The issue is available starting Friday and is free (Vice can be found at places like Tower Records and such, but it tends to go quickly).