The Bushes have released their 2006 federal income taxes. Their income for 2006 was $765, 801 and they paid $186, 378 in taxes.
The Cheneys had a taxable income of $1.6 million and paid taxes in the amount of $413, 326. They actually overpaid this year (by $51, 463), but elected to put it towards their next years tax bill rather than get a refund.
You can access their actual tax returns as well: