Groups Search

Facebook allows users to search people's profiles (e.g. friends) by various classes such as work friends, college friends, regional friends, etc. Facebook should allow people to also search groups by similar criteria. I am members of some worldwide groups that have thousands of members, but I'd like to see if some of these people with the same interests are in a local (e.g. regional) network near me. Other searches within groups may be just as useful.