You can now embed presentations on websites by uploading PPT created from desktop client & upload it to skydrive.
How :
( 1 ) Create PPT from Microsoft Power Point .
( 2 ) Upload that .pptx file to your skydrive account & mark that folder or file as public.
( 3 ) Get the embed code & paste it into your website or blog , And now you can see your ppt on web browser without installing any addon or writing any code .
