If you've ever wanted to know just exactly how much DNA you share with your ridiculously tall brother or doppelganger best friend, you'll soon be able to find out. 23andMe, a personal genomics startup in Mountain View, CA, is about to unveil a new social-networking service that allows customers to compare their DNA. The company hopes that the new offering will encourage consumers to get DNA testing, potentially creating a novel research resource in the process.



