From Adobe Systems:
Acrobat is a set of online services: file sharing and storage, PDF converter, online word processor, and Web conferencing which you can use to create and share documents, communicate in real time, and simplify working with others. Features: Send a link instead of an e-mail attachment - rather than passing e-mail attachments back and forth, simply share your file online with a URL that is always the same. Control access by creating a list of approved recipients - at any time you can add or remove individuals from the list of people invited to view your document. Easily embed documents on your website, wiki, or blog - there's never been a better way to show off your work online. Select one of the files you've uploaded to Acrobat.com and click Copy HTML, and then paste the code into your Web site.