Update as of 2011.
The U.S. Government Printing Office has published an 849 page PDF of the final text of the Dodd-Frank Wall Street Reform and Consumer Protection Act, which represents the official version adopted into public law. While large, this version allows for easy full-text searching and easy searching for any particular section. (Due to its size, you may need to right-click on the link and save a local version of the PDF before opening.)
The International Association of Risk and Compliance Professionals has also published a website with the complete Dodd-Frank Act in smaller chunks if you’re focused on a particular section.
The Library of Congress also provides the version passed by Congress in both PDF and text (see the links next to #6).