The college commencement speeches are mostly over. The diplomas are handed out. The parties are winding down. The deadline for repaying student loans looms. Newly minted college graduates are looking for employment, pounding their keyboards and working their mobile phones. Although the job market is slowly mending, it remains grim for young college graduates. The unemployment rate for graduates aged 21 to 24 averaged 9.4 percent over the past year (ending in March 2012), while the underemployment rate was a steep 19.1 percent, according to calculations by the Economic Policy Institute.