Not sure if anyone said this yet but the cross that Peter was wearing is called an Ankh. I looked on wikipedia and the Ankh is an ancient Egyptian symbol of life and fertility. I find it a big coincidence that it happens to now belong to Amy who's son happens to survive birth on the island. But we all know there's no such thing as "Coincidence" on Lost haha

Go take a look at this thread OMG the statue
http://forum.thefuselage.com/showthread.php?t=109067

since the ankh is being discussed there as well.