First off, the official disclaimer...I am not a doctor and don't play one on the forum. My comments are limited to personal experience and information obtained from my wife's medical care. I know from experience that you can't help but worry when you're wife is pregnant, but I'm glad that you're being vigilant and looking out for her.
It's my understanding that not all symptoms will manifest themselves during pregnancy and your current physician's desire to refer you to a specialist is prudent. You may want to refer to the signs and symptoms page http://www.preeclampsia.org/symptoms.asp for a fairly comprehensive list of things to watch out for.
The high protein count is definitely a cause for concern, but not panic. Finding a specialist that can explain exactly what is going on and how they are going to manage the pregnancy is very important. In my wife's case, we were referred to a top-notch perinatologist who gave us peace of mind by explaining everything from what's going on with her and the twins, to how her meds worked, to what to look out for, and by just being there to answer each and every question to our satisfaction. Good luck in finding the specialist who will give you and your wife peace of mind and answers, and please check back in with a status update.
P.S. I don't know if your wife's doctor referred her specifically to a maternal-fetal specialist, but you can find specialists on http://www.smfm.org