Not the World Wildlife Fund, but the Windows Workflow Foundation. This is Microsoft's initial foray into workflow and at first glance it looks quite good. I have to admire the vision and execution Microsoft have shown here. WFF coupled with the more meaty document management capability of Office 12 with Sharepoint Services can now provide a serious alternative to the FileNet's, Documentum's and OpenText's of the world. For your average approval routing or correspondence management type of document centric workflow applications it would be hard to look past this technology.
I wonder where the Open Source offering with this level of integration and friendliness to integrators, administrators and developers is? Open Office? I don't think so. Maybe 2006 will be the year of Microsoft after all.