Cool reference lists for brands in social media found

For all of the readers interested in an overview on which brands are using social media (mostly US) and how, please follow the links below to some well known fellows in the social media community found on a post from Guy Kawasaki: today.

Peter Kim’s list:

Building on Peter’s list here is Ray Schiel’s categorized and extended view of the social media activities brands undertook so far:

If you find more examples (good or bad) on that topic please share!