I just ran across a free online file converter called Cometdocs.  This free online service allows you to convert different types of files to multiple other file types, including PDF.  You can also compare two files and get the results.

All you do is browse to a file on your disk, select the destination file type, then type an email address of someone to send the results to.  The recipient receives an email with a link to a page which allows them to download the resulting file.

The service keeps your file on their server for a limited amount of time (it wasn’t obvious to me how long in my brief perusal of their site) but if you want it to be stored longer you can sign up for a free account.

Very cool service!