The jEditable module provides integration between Drupal's CCK module and the excellent jQuery plugin, jEditable. It is implemented as a CCK formatter, which makes inline editing possible through regular node displays, Panels, Views, or anywhere else you can place a CCK field.
Currently supported features are "click to edit" functions for text fields, number fields, date fields, node reference fields and workflow transitions.
So what is this good for? it provides a very quick and easy way to update the things they need to change without having to edit specific fields without having to switch to the full-blown node editor.
It is with Views integration that jEditable really comes into its own. It allows users to edit many nodes at the same time, e.g. if the same field must be updated for many nodes.
Major overhaul
This module is undergoing a major rework to make the it more suitable for mainstream use. The latest 6.x-1.5 release provides complete input validation of all supported fields as well as formatting. The module also provides user confirmation that the new field value was actually stored in the database.
New in this release is Views integration which moves away from using formatters, thus restoring them to their original purpose.
Further development will be made on the a new 6.x-2.x branch which will break 6.x-1.x versions of the module. Specifically, the jEditable formatters will be removed along with the 'Create Node Revisions' admin setting.