The SEC has set forth a time linefor finalized rules as well as tentative timing for future proposals and rulings, with respect to all the changes and studies required by the Dodd-Frank Wall Street Reform and Consumer Protection Act that as signed into law on July 21, 2010.
http://www.sec.gov/spotlight/dodd-frank.shtml
The Dodd-Frank Act itself can be found here:
http://www.sec.gov/about/laws/wallstreetreform-cpa.pdf
A summary of the Act is here:
http://banking.senate.gov/public/_files/FinancialReformSummary231510FINAL.pdf