I know that a while back there was a lot of talk about being able to see a membership directory, like the old "Who's Who" database on the old Ranchos site. We made some improvements to the membership listing, which is still available at http://www.nuestrosranchos.org/profile
I have now installed a new module that allows advanced searches for members so you can basically search in specific profile fields, such as "Tepetongo" in the research location field or "Aceves" in the research surname field. The results give an abbreviated profile of each member that meets the search criteria.
The search function is available by clicking on the search button at the upper right of the main page, then clicking on the tab labeled "User" when the search page comes up. You will then have a choice of doing a simple search which will search all the profile fields or doing an advanced search which will search specific fields.