Slideshare

Among the Bubble-like number of Web 2.0 start-up companies burgeoning every week, Slideshare is worth the try. The YouTube for PowerPoint, Slideshare allows users to share their presentations. At the moment, no privacy : every single uploaded file is public, so beware when considering using Slideshare for your business. On the other hand, it could be a nice way to make the World know about your job...

Of course, as on the other file sharing websites - Flickr, YouTube, etc - there is a lot of crap stuff done by supposed-to-be-the-next-new-economy-icon. However, many established companies and startups are using Slideshare to publish their business-oriented ppt.
A pretty nice example here...
Oh, by the way : Slideshare is also a wonderful tool to spot people creating their prezos with MS PowerPoint and those playing with Keynote...