She is an impressive and experimental writer (check out her "Visit from the Goon Squad") who does a great job with this form. The thought-sized chunks give the story a lot of space and cleverly invites the reader to imagine a lot of context.
[1]: http://en.wikipedia.org/wiki/Black_Box_(Jennifer_Egan_story)
He rebroadcast it last year, but the original was in 2007 when Twitter was new and no one knew what it was going to be good for. So he experimented.
I followed it at the time and had the tweets sent to my phone as they came in. It was an interesting way to experience a story. Because it was spread out over time, I found myself keeping the context in my head as a low level background process.
There's probably a very interesting way or two to use that phenomenon.