Social Networking, like Facebook, is a tool that is being used by many genealogists - including people of Greek descent searching for more about their family history. I took a look and found MANY looking for people with their Greek family surnames. Here are just a few:
Doukas - are we related? Δουκας
There are plenty more - check for yourself. I plan on looking through more over the next week or so, and will post them for you.
If you want to learn a little more, check out the article How Genealogists use Social Networking published in the Family History Bulletin for WorldVitalRecords.com
Good luck with your Greek surname searches.
Georgia Keilman nee Stryker (Stratigakos)