@EdBennett has been tracking adoption of social media by hospitals over the last couple of years on his blog Found In Cache! It is an excellent resource and I've mentioned it in my presentations, book and other writings. I'd always thought it was a big task for one person to keep up, so I'm truly grateful for Ed's efforts.
Ed planned to archive that list, but now it will be maintained and expanded by the Social Media Center at Mayo Clinic and I think that is a fitting move. To me, we are still at the beginning of social media adoption by hospitals and it would be a huge loss to see this list retire.
Please join me in thanking @EdBennett for starting the list and keeping it going these last few years!