Gargy,
the godfather idea sounds good I was thinking, i guess for me the decision at this point is easier as we have used an unknown donor but if your donor was a part of your child's lives I guess it would be a little easier when the time comes to know about their conception they would have already developed a relationship with their SD and an understanding of the type of person they are, I hadn't really thought about it like this before hmmmmm, food for thought!