Slideshare
I've come across yet another community site … it allows people to share slides.
<object style="margin: 0px;" height="355" width="425"> <embed src="https://static.slideshare.net/swf/ssplayer2.swf?doc=zag-part-1-the-real-competition-is-clutter766" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" height="355" width="425"> </embed> </object>
Update: 2021-12-29 Wed
Alas, linkrot struck, and this example is now broke at Slideshare. So, I'm just showing the original code now.