Simplified tax filings (ie, tax authorities tell you what they think you owe, so you don't inadvertently misfile and get penalized for it or worse, get an audit notification on what could have been sorted out before the filing date) - this is what other countries do, and I hear it's really awesome. Found it here:
Simplify Tax Filings for Middle Class Americans: Obama will dramatically simplify tax filings so that millions of Americans will be able to do their taxes in less than five minutes. Obama will ensure that the IRS uses the information it already gets from banks and employers to give taxpayers the option of pre-filled tax forms to verify, sign and return.
I hope Intuit's lobbying doesn't screw this up. This is one Obama promise I'd like to see implemented.