flower-
My best advice to you right now, is to pick out a name for a boy, and another for a girl-and not to get rid of all of the pink things just yet. Maybe even pack two outfits in your hospital bag-so that you are covered in either case.
The pros and cons with your situation is that the 3D ultrasounds are much clearer and easier to actually "see" the parts and avoid the confusion such as a bit of umbilical cord being mistaken for a penis...but on the other hand, the hospital u/s was done the latest, when the baby was the most developed. So...at this point I would say it could go either way.
You may very well be going into this and getting a "surprise" on what you are actually having.

I hope the baby's sleep area isn't pink ruffles or baseballs-maybe something a little neutral? *crosses fingers*
My ulstrasound said "boy" last week, but all of the big ticket items-nursery bedding/stroller/car seat/etc. are still gender neutral just in case.
How many weeks do you have left to go?