As expected, the I bond rate for the period of November 2012 through April 2013 will have a composite rate of 1.76%. The new composite rate reflects the 0.88% increase in semi-annual inflation as mesaured by the CPI-U index and the new fixed rate, which remained at 0%.
As always, the 1.76% rate is available now for newly purchased bonds while the 0.88% CPI-U change will affect currently issued bonds on the 6-month anniversary of the bond's issue date.
Source http://www.treasurydirect.gov/news/pressroom/pressroom_comeeandi1112.htm