NVIDIA will need to make new bridge chips so it will take some time before you'll see these cards in stores. Some sources say the launch of these AGP cards might be delayed for at least three more months because of the bridge chip problem.
Our well informed sources confirmed that Nvidia still didn't order the new bridge chips. It takes two to three months to get the chips out of the fabs, probably TSMC and by that time the new PCB's should be designed in order to support the AGP interface.