Foreign Exchange Rates
http://www.federalreserve.gov/releases/g5a/current/

Tax Information for Tax Professionals
www.irs.gov/taxpros/index.html

Internal Revenue Service
www.irs.gov

Supreme Court/Courts of Appeal
www.findlaw.com

Revenue Procedures, Notices, TAMs, etc
www.legalbitstream.com

Get your Annual Social Security statement online (new – May 2012)
http://www.socialsecurity.gov/mystatement/