You can now download all your Google Docs documents to your hard drive with a programme called Syncplicity.
Syncplicity is a file back up and synchronization service, that works with your Google Docs account.
Once that initial sync process between Google Docs and your local Office document folder is done, you can edit any document locally using Microsoft Office Word or OpenOffice and Syncplicity will automatically upload the updated version of the document on to Google Docs.
This is very handy if you need to edit documents offline (like in a plane or a taxi) without requiring a browser with Google Gears.
Also, if you create a new document in your Google Docs account, a copy of that document will get downloaded to the local folder so you always have access to the document even without internet.
At the moment Syncplicity is free during it's beta period, and is very easy to use, with it's colourful user friendly interface.