I don't know if you will get this before your ultrasound today, but my suggestion would be to have the tech write it down and stuff it in an envelope since you are still undecided about whether to find out. I am due in June with my first baby and do NOT know the gender. I have always wanted a surprise, and I kinda feel like it is my prize for getting through labor and delivery!!! I was VERY disappointed with the criticism I got from everyone in the begining, but I am not about to ruin my surprise for their nosiness(is that a word?!) I would tell them that I am happy with my decision and the doctor is fine with it too. (It kinda puts the guilt on them for not thinking of a healthy baby over knowing gender!) I am still having a baby shower, and just asking for things like crib sheets, matress pads, gift cards towards the purchase of stroller and play yard, monitor, socks, diaper bag, etc. There are tons of gender nuetral things out there. Besides, it will be heat of summer and all the baby will wear is onsies and diapers anyways! My family also makes a game out of betting what gender, what day, and what time the baby will be born. Ha! Good Luck with your decision!
~Meg