Both eSnips & Scribd rank really well in search engines.

Upload your eBook, audio, or video to eSnips.com

Check out themed eSnipper's items..
ie, this person has uploaded audio & video about "The Secret"
http://www.esnips.com/web/tiny1130-thesecret/

Signup for FREE 1-hour audio class from Jack Canfield
http://www.jackcanfield.com/intro_audio

Signup for Free Daily Audio Message from Bob Proctor

http://www.bobproctor.com/insights.asp

Once you have posted a new entry to your blog, you can "ping" search engines and blog directories and have your blog re-assessed and indexed in as little as 48 hours.

Pinging alerts the search engines and directories that you have updated your content and gets them to scan your site again and use the new information in their placement algorithm.

Be sure to submit your blog to Google as well as to the following blog search engines and directories: