We went for our ultrasound this morning and everything is looking good. The baby is measuring and growing right on track. We also got to see some really cute pictures (which we'll post right away, of course).
At the end we asked the technician if she was able to tell the sex of the baby. She said that it looks like a girl. She couldn't tell definitively since the baby was sitting on it's legs, but she said that since she didn't see anything between the legs she would guess girl. But she also said not to run out and buy all pink since she couldn't tell for sure.
So, it looks like we'll be sticking to a mostly neutral decor and anything that is pink we'll just have to keep the tags on, just in case. At least the baby is healthy and that's the most important thing.