Amendments to the Canada Pension Plan (CPP) are being phased in between 2011 and 2016.  Generally speaking, there is increased incentive to delay starting your CPP.  The pension amount for those taking CPP before age 65 will be slightly reduced (phased in, starting 2012) and for those starting CPP after age 65 it will be modestly increased (phased in, starting 2011).  The changes also include the removal of the Work Cessation Test in 2012, meaning those starting CPP in 2012 and beyond will no longer have to stop working by the end of the month before the retirement pension starts and for the month the pension starts being paid

Further details of the CPP changes on the HSRDC website.