I've tried out LuLu http://www.lulu.com/ to publish my "Initial Guide to Blogs " as a FREE downloadable pdf file.

"I found Lulu relatively easy to use but I do advise you visit the Take a Tour."

"I consider this to be a quite 'green' way to Publish and, if you choose, sell easily."

There are...

• no set-up fees.
  
• no minimum order.

You...

• keep control of the rights.
• can set your own price.
  

And each product, if a hard copy is requested, is printed as it is ordered.

Take a look and why not publish your own works for download (and make a profit if you wish)