Plone 3.0 Released
The newest version of the Plone CMS is available with significant new features as well as usability and security improvements.
Version 3.0 aims to make Plone more efficient to work with. This release adds versioning, locking, inline editing and validation, link integrity, intranet/extranet workflows, wiki support, OpenID support, and full-text indexing of Word and PDF files.
Here is the full coverage:
Plone.org release announcement