This isn't quite getEveryDollarSpent, but check out http://usaspending.gov/. The site tracks all federal contracting dollars spent. It has an API and a fairly detailed set of data.
Rather than one giant government API, we will probably see each agency slowly create more meaningful ways to get at their data. I expect there to be some exciting open data initiatives from the Obama administration.
jcarbaugh won't say this, but the Sunlight Foundation to which he works for is pretty much pushing the government to adopt API standards. They were the folks who were partially responsible for this great link among other amazing products.
I've been outed! And there goes my plan to covertly push my radical government transparency agenda. Damn you, ALee!
I've only been involved in this for a little under two years and it is amazing to see how quickly the government has become interested in open data. There is still a LONG way to go, but I think we are going to see some great things in the coming years.
Rather than one giant government API, we will probably see each agency slowly create more meaningful ways to get at their data. I expect there to be some exciting open data initiatives from the Obama administration.