If you run multiple monitors on your computer, you can now choose which screen to share in a screen share mode:
The second enhancement allows the presenter to pause screen sharing, leaving the last image frozen on attendees' screens while the presenter takes care of distracting actions behind the scenes. I have used this in other products and it's a great way to minimize the break in concentration caused by switching or resizing windows between parts of a demonstration (as one example).
The third enhancement is for Apple Macintosh users. Mac presenters can share a named application rather than the full desktop. They can also give control of the application to an attendee, letting them drive the keyboard and cursor, but only within the shared application.
Those are all good things. Now go back and look more closely at the image above (copied from their original blog post). Does it seem strange to anyone else that ReadyTalk is using an example that shows two instances of a directly competing product in the list of applications running on their computer? ;->