Me too! I will be nearing the end of my second trimester (it actually ends mid-trip and I go into my third). I get eaten alive in the summer in NJ but can't actually remember getting bitten by a mosquito in my past trips to WDW. I have been following the news and it just is not a huge concern based on the data. Humans are the carriers, so unless the infected population from Miami all go Orlando I don't believe it will make it there in the next 8 weeks or so to the level that I need to panic. I actually read someone say on a message board to a news site that we should build a barrier to keep the mosquitoes out as people think they are flying up from Brazil

I am at risk in NJ this summer too as I live outside NYC and many South Americans travel in and out of this area, I cut down on my risk all summer and so far no Zika reported up here.
We booked it before the warning was out a few weeks ago. My bigger risk is getting gluten b/c I am a celiac which can happen at a million places, but WDW is one of those places that is super safe. Statistically I am more likely to get in a car crash on my way to WDW. My friend is a nurse with a masters degree and she just went pregnant in the summer, so I know I am not the only one thinking that it is unreasonable to still go to Orlando right now. I am going to watch it and if it becomes majorly risky will make a decision closer to the date.
Also what the previous poster said about the genetically modified mosquitoes is a huge point that I saw mentioned elsewhere that the news channels will not touch with a ten foot pole. The mosquitoes were bred and released in Brazil so that when they give birth the offspring have a defect and die. Suddenly a disease like this is causing a birth defect in humans after all this time...