Can I edit a content while it's published?
Can I modify a content without retracting it, that is edit it while the published version of it stays visible to everyone?
Yes, with the Working Copy Support (Iterate) addons.
This add-on, based on CMFEditons adds working copy support (aka. in-place staging) to Plone.
This feature, often confused with versioning is more appropriately a staging feature and it's in every Plone 3.x blundle.
