Though Google Docs are not fully functional with iPhone, you can create them from a standard email message. On a desktop browser, those you share with can open them, edit them and download them in various file formats. From your desktop, sign up for Google Docs, log in and press the Upload button. At the bottom of the screen you'll see a lengthy email address. Copy and paste this in your Contacts and sync it with your iPhone. Anything you email to this address becomes a Google doc. The Subject is the title of the doc and the body becomes the content.
A cool feature is that you can add emphasis to your doc with standard html tags in your email:
For italic use <i>emphasized text</i>
For bold use <b>emphasized text</b>
For links use <a href="http://iphonesmarts.com/">shown text</a>
For email links use <a href="mailto:me@myselfandi.com">shown text</a>
These are the basics. Many other html tags also work.
View your docs online at Google Mobile. This becomes a convenient place online to store any doc that you commonly need to view.
Creating a Google Doc
