I am checking out DimDim, another web-conferencing tool. Setting up a meeting in Dimdim is very easy. You can kick off a meeting immediately or schedule it for later (including recurring meetings).
The product lets you conduct online slide shows using PowerPoints and PDFs. You can annotate as you go and let users mark up, too. You can also work on a shared, multipage whiteboard. Or you can share your screen, which is useful for demos.
There are a lot of ways to interact with your viewers. You can send them Webcam video and audio (or make it a two-way conference if you like), chat with all attendees, or send private instant messages to individuals.
Check it out: http://www.dimdim.com/index
