If you are looking for information on what interest rates have done historically, here are a couple links:
First Republic Bank has a web page that will graphically show interest rate history for one, five, and ten year CMT, one month and six month LIBOR, COFI, and prime rate.
http://www.firstrepublic.com/finmkts/historical.asp
Also, the Federal Reserve has interest rate historical data at:
http://www.federalreserve.gov/releases/h15/data.htm
