What are your most useful synchronous online facilitation practices?

Beth's Blog: How Nonprofits Can Use Social Media

TechSoup holds regular meetings for nonprofits in Second Life and I have been attending regularly and sometimes facilitate like this I did this past week. So, I've been reflecting about effective facilitation of virtual meetings in Second Life Right now the primary method of group interaction is via unmoderated chat interface. But there is also a trust issue too -- particularly if you don't know all the avatars in real life.