The Panels In-Place Editor was a fantastic piece of functionality added to the Panels library, funded by Chapter Three (thanks!!!) and implemented almost entirely by Sam Boyer. This feature allows users to designate Panels of various types as editable in-place. This means that users with privileges are given a button at the bottom of the page which allows them to dynamically add, remove and rearrange content on that page. It's much more limited than the typical back end editor, but is much more usable by content managers who are focusing highly on the content.

ArticleDrupal · Panels