Josh Marshall links to an appearance of former CIA Agent Ray McGovern on Tucker Carlson's show in which McGovern more less directly accuses Cheney of being behind the forged Niger uranium documents. McGovern claims to have evidence - Congress had better subpoena him quick.
Personally, I always suspected the Chalabi axis, but its obvious that the US government has pointedly avoided getting to the bottom of the matter. I think it maybe time.
Josh has reported on this story a lot, but hasn't seen any smoking guns. The trail always peters out somewhere in the Italian intelligence service.