Ever wonder what your webinar participants are really doing?

I know, they're totally engrossed in the webinar, hanging on the presenter's every word, jotting down notes and typing in questions. Or maybe they're more like the @CMEGuy (and me): This is your brain 30 minutes into a 60-minute webinar.

But seriously, what can we do to keep people's attention throughout an entire webinar? I know we need to break up the information into small chunks, provide some multimedia, engage in ongoing chat and/or Q&A, but even that doesn't always keep them engaged. Oh yeah, maybe we just need totally compelling content?