In T3 we'll be using threaded discussions created from Lotus Notes databases. These databases have all been web-enabled so that you can participate from the web. Whey you work with a threaded discussion, you are participating at a time that is convenient for you and you are posting information to a central database for others to access. It works pretty simply.
People post questions and others respond to the questions.
What's really nice is that you don't have to be doing this at the same time. This is called asynchronous communication. Click on the link to your discussion group. When the page opens up, you'll see directions explaining the threaded discussion. Read through these for more information.