Here is a downer to consider.
The "rebate" you get this year will be taken back from you with next year(08 return filed in 09). If Hillary or Obama win the presidency and the Dems maintain control of congress I speculate there will be a RETROACTIVE tax increase as their first order of business in 09. This is what Bill did his first month in office.
If this happens, then 09 returns will have very few refunds and plenty ****** off people who for the first time have to pay more taxes. Of course Hillary or Obama will blame it on Bush for giving you the money early.