Log in to SlideShare: "SlideShare is the world's largest community for sharing presentations. You can…
upload & share your presentations (ppt, pptx, odp, pdf, keynote)
embed on blogs & websites
use Leadshare & AdShare to generate customer leads
create branded channels for your company/product
create a webinar by linking slides with audio
embed YouTube videos into presentations
And now SlideShare also supports all documents formats (doc, docx, odt, Apple iWork). And it's completely free."