A pretty good article in Wired this issue on "ARG" or alternate reality games, focusing mainly on the NIN and Trent Reznor game around Year Zero. The article itself included several pretty obvious clues and mini-games, but it is the online edition that really shines - including links to special video and a bit more background. Among them a clip that ends with a link to the Open Source Resistance.
One minor gripe, having the same question online makes sense - but that makes the magazine redundant, so perhaps there should have been a more direct pointer to the 'hidden' link and the content (or perhaps there was? In a hex transformation of the text, or as the first letter of each word of the hidden message? The possibilities are almost endless, considering the complexity of some of the the other "hints")
...and the sun shone brightly on the new snow...
