Hi Jeanne,
Here's the answer to your question. A few days ago Katie put a link on her website about some event that Eckhart Tolle and Oprah are putting together in a "webinar" format. Today I was curious about it and went on to Oprah's site to check that out.
After that, I typed on Google the terms "Eckhart Tolle Byron Katie" just to see what would come up, and
Forum:
"Cults," Sects, and "New Religious Movements"