Hi Deb, nice to see follow up from conference meetings. Doesn't happen to me very often :) external links require a single square bracket around the link. Following the link (but inside the bracket) include a space and then the text you want to be clicked. [http://example.com example]
It will be interesting to explore the notion of online facilitation while at the same time many of the different platforms that make up vastly different online experience. Its going to be a doozy, but I'm sure we'll all be getting good stuff out of the experience together.