Related link: http://plone.org/foundation
You can find the full Plone Foundation announcement text at: http://plone.org/foundation/about/pr/formation. Here are a few exerpts from the May 21st announcement:
The Plone Community today announced the formation of the Plone Foundation, an organization committed to providing high quality open source software products focused around the Plone content management system.
[…]The Foundation will provide development, marketing, and financial support for Plone and related projects. This support comes as Plone is developing critical mass as the most popular and powerful open source content management system. Although the Foundation will provide oversight for all Plone activities, the technical aspects of each project will continue to be governed by each project team.
Zope and Plone anyone?