Cool Jim!
Regarding gender I agree with Beth. Every kid is predisposed to be unique and individual, gender is just one small part of the equation. The environments we create for them and the experiences they have take it to another level.
We have a 4 1/2 year old daughter, a 2 year old son and a T-Minus 7 weeks baby-on-the-way. We've always waited until the birth to find out the gender, and as a relative pointed out with this pregnancy "you've already got a boy and a girl - now all you can do is try for flavors".
Best wishes,
Deanpaul