SlideShare Portlet can embed presentation from SlideShare.
How is this working?
The portlet gets an embed code form SlideShare, and displays the presentation for the portlet place.
It's working only with valid xml code.
Getting an embed code
Getting an embed code. Go to the SlideShare, select the presentation, which you want embed to your site.
Click to the embed button, and copy the code to clipboard.
Click to the edit at the portlet, and paste the code from clipboard to the SlideShare Presentation.
If that's complete, click to the ok button, to save the presentation at the portal.