Google grossly underestimated how important privacy has become to average user in last year or two. Unfortunately this could have been the killer feature that Buzz could leverage over Facebook and Twitter because they do such a horrible job at it. In fact Facebook's take on privacy has become down right scary. Privacy controls for Buzz could have been it's differentiator. Instead it's turned into the killer mistake threatening to bury Buzz before it even got out of the gate.
But, everyone screws up, everyone makes mistakes, it's all about how fast they fix it. So get some pizza, jolt, and strong coffee it should be a long weekend Google Buzz Engineers.