The Google Docs API is now capable of updating the actual content of documents, sharing documents, and moving documents into and out of folders programmatically.

Editions impacted:
Standard, Premier, Education, Team and Partner Editions

Languages impacted:
US English

How to access what's new:
Visit the Google Documents List Data API overview site to get started. (See link below.)

For more information:
http://code.google.com/apis/documents/overview.html