Online chat is likely an ever increasing source of the evidence of the evolution of the English language, more than blogs, newspapers, etc.
OH: I looked in online chat rooms quite a bit, something that in my normal day-to-day life I never do. I looked at hundreds of blogs and hundreds of websites. Blogs in particular were incredibly useful, especially blogs written by teenagers and college students. I found the language just wonderfully inventive and interesting. In some cases, I came across words and structures that I didn't quite understand, and so I would then Google them in isolation and find other instances of them. Occasionally I'd ask some of my younger friends what these things meant until I felt like I'd nailed the meanings.