All Things D says that Yahoo is buying Zimbra. Congrats to the Zimbra team for keeping the OSS acquisition numbers in the stratosphere! $350 million is a nice chunk of change. Note to big companies: you better buy the OSS startups now before they are all gone.... All Things D says that Yahoo is buying Zimbra. Congrats to the Zimbra team for keeping the OSS acquisition numbers in the stratosphere! $350 million is a nice chunk of change. Note to big companies: you better buy the OSS startups now before they are all gone. Open Source