I have a Free Conference Call number that I have already entered in to my account for participants.  I never know if they will have headphones or use the telephone.  Please consider integrating the 2 together.  I could click the Phone button and it would dial my con call number and enter the leader access code.  The con call and the headphones people would be integrated together.  I could use my headphones to talk to both at the same time.

It makes Acrobat.com even better than it already is.