New Internet obsession: Rocketboom. In particular: Know Your Meme.
Rocketboom is an awesome Internet news show, but they have a section, Know Your Meme, that explains popular memes. Apparently I've missed out on a lot because I don't know what half of these are, but now we can all learn together! It's all quite entertaining.
I already knew a bit about this one, but oh how I love it!