Slideshare is the YouTube of PowerPoint.

Pretty nifty on its own. You upload the PowerPoint, then a flash-based version is created. This can be viewed on its own webpage or embedded in a blog. Just like YouTube videos.

But presentation slides don’t make a presentation.

So, Slideshare now allows you to upload an accompanying audio file. The presentation above – a Slidecast – shows you how easy it is to synchronise the PowerPoint and the audio clip.

Okay, ppt + audio doesn’t make a presentation either, but slides with audio is better than just the slides.

If it’s done properly.

(Direct link to Slidecast demo.)