I don't know. I post here and at one other forum. Other than that I use the internet for work/email/news/ and a couple other random things. Any "internet culture" things that aren't posted here or the other place I frequent are out of my grasp. If I've seen anything about 4 chan before it wasn't significant enough to be memorable, though a quick investigation leads me to believe I'm not missing out on much, and that some of the very worst and most annoying things about the internet have been spawned there. From wikipedia: "4chan users have been responsible for the formation or popularization of Internet memes such as lolcats, Rickrolling, "Chocolate Rain", "Pedobear"." That alone is enough to make me want to burn the place down.
Though I have seen some photos with the "/b/" thing that I can't say I'm upset about.