hi , nice plugin, it would be even better with other new features.
first was already mentioned here:
about adding a button in the WYSIWYG editor while writing a new post, where i simply add the link of the pdf, or even directly upload the ppt to the post.
but the second is also important,
it's simply to add an hyperlinked icon (ex: small magnifier)that will open a new widow like the shadowbox http://wordpress.org/extend/plugins/shadowbox-js/ or open in a new tab (so you can view more than 1) and there view the documents.
1- adding more than 1 document in a single post will dramatically slow the page loading, and if i someone needed to view the last document (out of other 10) he will simply leave the page :(
2- it will save big space in the post!! again adding more than 1 will force you to but a smaller viewers ... and no one wants that.
finally if you decided to add a button, i would love to have the choice between direct view of the document or click a link for it.
also please... can you add search, email and print buttons :)