Google released Buzz for Gmail and there are issues if you're not careful with your settings as well as possibly unwanted group overlaps (I wouldn't be too surprised if in the future, a less tech savvy family member posts a meant-to-be-private reply to a public buzz message of yours, because after all Google did integrate something very public into a product that was formerly rather private). However, Rome isn't burning and Sergey Brin isn't playing the fiddle,