Yup, if you deliver presentations, you'll want to grab this great, free download which adds a toolbar which facilitates simple interop between PowerPoint 2007 and SlideShare to PowerPoint.

SlideShare Toolbar for PowerPoint 2007

AND, the new toolbar includes reporting - how cool is that!

Presentation Stats 

SlideShare » SlideShare Ribbon for PowerPoint (SlideShare is the best place to share powerpoint presentations)