I too don't really understand what exactly is 4chan apart from it being a huge website/forum for people to discuss topics. I believe what made it famous is it's random section, where people can simply talk about anything and everything?
I also think "/b/" can be used to represent 4chan.
If anyone could just simply explain really quickly what it is, that would be nice. Also, if anyone knows about the whole Boxy phenomenon, that'd be nice to explain as well. You can PM me if you feel like, as I don't want to lead this topic too astray. Feel free to post it here so everyone else can see though - if you'd like.
I have a doubt that anyone would bother to explain this for us "noobs" who don't know exactly what 4chan is, so, in that case, don't make me tri-force you 4chan users. :razz: