AMD President and Chief Operating Officer Dirk Mayer announced last week that the 45nm Bulldoze architecture will start sampling next year.
From what we know AMD will sample Bulldozer at late 2009, but the production parts are planned for 32nm. There is a possibility that AMD will launch Bulldozer in 45nm, but it will try to quickly move to 32nm.
AMD didn’t even start its 45nm production, and it has to heavily plan to go to 32nm. If you have one and a half fabs, their transitions tend to become real headache.