Peter,
What Tom says is correct. Trying to include the text chat with the charts would increase the screen size quite a bit. Also, there are some who would rather not have their text chat recorded...no sure why as I haven't seen anybody incriminate themselves yet...except maybe Spike. ;)
Tom and Erich do a good job of outlining the question before they answer it. Sometimes I will move the text chat window over the recording if there a some relevate converstions going on that need to be viewed, but for the most part Tom and Erich take care of it quite well.
-Jeff