I was recently asked “How can I search Facebook for Keywords in the profile? Instead of Profession as a “Realtor” which has 1000 different variances.”
Well after looking around some I discovered that if you click on friends then on the option to find friends, you can enter a subject under “Search for People” I entered Scuba, on the next screen you will see an option to filter results on the left from All Results to posts by everyone.
Another option is to find “Pages” for the topics you wish to find Friends for, who share those interests. By visiting pages on Scuba, I can find people who share that interest with me.
With some experimentation you can tweak your search to find those in your area with a similar interest to you. I hope this helps.
Would be an idea for a nice facebook app, where people can register and enter their interests and whatever. And other can search for it.