Sen. Hillary Clinton, the Democratic front runner for president in 2008, unveiled a college aid plan Thursday that would pour $8 billion a year in new funds into an expanded tuition tax credit, bigger Pell Grants, support for community colleges, and work force training, among other things. It would also require public colleges to set multiyear tuition rates to help families better plan to pay for college and compel them to publish information about the employment rates and earnings of their students upon graduation (proposals that even the Spellings Commission might love).