Library Stuff has a post about KoolWire a service which allows you to email Word (.doc), Powerpoint (.ppt), Excel (.xls), Jpeg, GIF, Rich Text Format (.rtf), TXT files and convert them to PDFs. I tried it myself and it works well.
KoolWire Lets You go from Word to PDF via email
May 23, 2007 by jcornell808
Used it too. Works well and it’s incredibly fast!
Yeah, tried it too with a pretty heavy ppt file. I got my PDF in no time and without need to restart my PC…when I tried to convert files it got stuck all the time!