Update: The most recent word from AllThingsD is that the product does not exist in any form other than in the lab. Google is saying there is no product to launch tonight or any night soon. With Google, it’s hard to tell what’s fact and what’s a smokescreen – if the product is real and not ready for primetime, it is unlikely that Google would want it known before it arrives. They have simply been burnt too many times by the hype machine and their most successful launches have simply “happened” without anticipation or rumor. There has been much speculation about Google’s next entry into the social web and…