What an adorable idea! I love the sealed envelope thing, that's cute. As long as the tech understood and nobody blurted it out!!
We're old fashioned I guess when it comes to finding out the gender.
My husband once said "If God wanted us to find out what gender our babies were, he would have given women little T.V. screens on their tummies. Like the Telletubbies!"
I'm actually a little torn with finding out this time around....but chances are we will go for it