Google Sets

Maybe you've had this problem: you have two or more items and you need to find more that are related. In a talk about Google Hacks at Black Hat, security researcher Johnny Long pointed to a service offered by Google Labs called . Simply enter in the known items, such as elm and birch, and you'll get back a set of related items. OK, maybe you haven't had this problem, but still it's a cool feature from Google (even if you aren't using it to guess subdomains on a remote network).