The best Ribbon interface library?
Can anyone recommend a good Ribbon interface library?

I can see that Microsoft is (maybe) planning to release a native Ribbon interface library in Windows 7: http://www.istartedsomething.com/20080917/windows-scenic-new-ribbon-based-ui-platform/

But for now, which 3rd party libraries are the best?
The best Ribbon interface library?
===

Can anyone recommend a good Ribbon interface library?

I can see that Microsoft is (maybe) planning to release a native Ribbon interface library in Windows 7: http://www.istartedsomething.com/20080917/windows-scenic-new-ribbon-based-ui-platform/

But for now, which 3rd party libraries are the best?