Negative Gamer writes:
"We had Big Daddys and Little Sisters in BioShock 1. Now we have confirmed Big Sisters, so surely it makes sense that we also have… Little Daddys?
The image to the left is called LittleOne.jpg and can be found (if you look hard enough) on the new BioShock 2 teaser site, SomethingInTheSea.com. If you trace a line with your mouse from the X marked on southern Ireland all the way to New York, approximately half way across a small dot appears (very hard to see unless zoomed). Click on it then trace from here south (towards South America) until another dot appears. This is the weird bit. Apparently you have to have a microphone plugged in and make the noise of a Little Sister. If you do it right you then get a link to this picture."