Well, colour us not-so-surprised. It seems a 4Chan reader has made its way on the Marketplace. Should you remember what happened previously when a developer attempted to get his 4Chan app approved to Marketplace (it was humorously refused), you'll be pleased to know that 4Chan Reader will cater for all your dark, mysterious needs. The app, which will set you back $.99 (79p) for the full version, is not a fully featured client, but will allow you to keep up-to-date with what's being posted on your favorite channels.
You can download 4Chan Reader from the Marketplace. How has this app been accepted? Users are required to manually add the channels that contain more questionable content, which is the case in the iOS 4Chan app. Note that this is not safe for work, home, or anywhere in public. Requirements include a dark room, and absolute companionless.