Looking for a WPF Ribbon control?

If you've been to any of my WPF talks or you went to the DC Vista Launch, you have probably heard me mention "a control vendor is working on a 100% WPF based Office 2007 style ribbon control."  Well, Denis over at DevComponents finally broke the silence about the WPF-Ribbon.  There is a private beta which you can sign up for.  Denis has all the details.