Hi all:
Here is a link to Slideshare: http://www.slideshare.net/
To use this site, create an account (you can log in w/ facebook if you want) and upload your presentation. The site will walk you through the process and will convert your presentation to HTML code that you can then copy and paste into blog. This will embed your presentation in the blog post. So, to do this, create a new post on this site and insert the code that slideshare has created. Once you post, you should see your presentation on the blog.
Embedding looks the nicest, but if you don’t want to do this, you can also upload your presentation file to the blog. To do this, create a new post, and use the upload “add media” button (see above the post text box.) This means people will have to download your file if they want to see your presentation (rather than embedding, which is immediately visible.)