The three you mentioned are all ones I check as well, especially since they are all Apple focused. Just to add another one that covers not just Apple stuff, but sometimes during Apple’s live events/keynotes I like to follow along with Engadget’s live blog. Whoever writes it is pretty spot on with their quick analysis and updating what’s announced and it’s nice to follow along and read when I’m in a situation where I can’t have audio on.

www.engadget.com