Coffee Break: Join us on Wednesday, April 5th at 10am PT to chat with Ben Gaines, Director of Product Management for Adobe Analytics. Ben will be online to answer your Analytics and Adobe Summit questions.
Both of these requests have been implemented, actually. Bounces and Bounce Rate are now available as metrics in ad hoc analysis, and a Bounce Rate segment is created simply by doing Visits (or Visitors) where Visit Depth = 1.