Try emailing me a higher resolution original and I'll play around with it. I think it's fun to have avatars with "real" people in them.
Avatars are square, so try to use a picture that puts the focus (faces) in a square. For instance, your 3 children could be two faces with one kind of above and behind (a triangle of sorts.
2nd cruise planned - March 2008 - Emerald Princess - Eastern Caribbean
first cruise - June 4th - Carnival Glory