Wimba on Crack and what is a chat anyway?

Last week was challenging to me because I was teaching some tooltimes and attempting to help students in the class at the same time.  I had to keep leaving the computer I was demonstrating on and I am sure having a snowball mike would have helped.  We have many different levels of proficiency in the class right now, and those most proficient are at home on wimba.  I felt pressure to keep up the dialogue for them at home and still assist the students in class with their problems.    I know when I was home on wimba for the first time, there was a lot of dead air, like a radio station, that was not a good scenario so I tried to avoid it.  Another thing I noticed is that this class does not use the chat window as much as previous classes, so it was hard to track who was on track at home and who wasn't.  I was disappointed when I realized the last two demonstrations of diigo and delicious were not archived.  They are useful tools and I could have used those archives with my teachers, guess I will have to make jings.  I am still learning how to keep it all flowing together without dropping any balls.