Converting powerpoint online
you could upload PPT to here - and then get embed code for blog, etc
Checkout all the suggestions from classroom2.0
Powerpoint to the web
Dont use bullets in MS Powerpoint
If you are a Google docs user:create a new presentation and import PPT file,Click "Publish" and "Publish Doc" then use code to embed (from @tombarrett)

converting ppt to movies - 5 different ways

Interesting blog using powerpoint and powerpoint presentations.
converting powerpoint to flash movies

Ways to uploadppt for online use