Engadget's coverage of an event a couple of years ago was so bitter and sarcastic I haven't been back to the site since. Gizmodo has been my gadget feed of choice since then.
If anyone know of any media sources who plan on live tweeting from inside the event itself, please post those Twitter links, as that may be an option as well.
I thought the gdgt coverage was good. It was very close to the way MR Live does there's. Likely modeled after it. Gizmodo, Arstechnica, and Engadget stopped loading for me so I abandoned them.