Don't know if this will help your decision or not, but I actually work for the vaccine research program at a local hospital and we are currently doing the H1N1 vaccine trials. I do all the data entry for our volunteers receiving the vaccine and immediate side affects are no worse than getting the regular flu vaccine - soreness at injection site being the most common for just a few days. Very few people have had even moderate side affects such as headaches or just generally not feeling great and all were gone within 7 days post vaccine.
True we cannot state long term side affects yet and it does seem that it is being pushed out fast, but we are not the first country running these vaccine trials. China is actually the ones stating that only one dose is needed. We are still running blood work on adults and children to see if one or two doses are actually needed. We just started enrolling pregnant women this week, but that is the hospital I work at - there are at least 13 sites around the country testing on various schedules. Every report I have read and doctor I have spoken with has stated that the long term risks are no greater than getting the regular annual flu vaccine. The CDC is rushing this vaccine so quickly because they do want to control the possibility of mass outbreak.
I personally felt safe enough with the vaccine that I enrolled my son (21 months old) in the trials. My daughter (4 years old) would have been enrolled as well, but her age group was filled quickly. My son has been fine with both vaccines he has received. The worse side affect being a little tenderness for a couple of days with the first shot. Otherwise he has been perfectly fine. Pregnant or not, I know I will be getting the vaccination when the release it as well as getting my daughter and husband vaccinated. Besides not wanting to take the risk of getting ill, I simply can't afford missed time at work or medical expenses of having a sick family right now. All things that may also weigh in on your decision.
Ultimately the decision is up to you and your husband. I understand your fears - on one hand don't get the vaccine and chance getting sick and worse case scenario, die; on the other hand, get the new vaccine without knowing the long term affects to your unborn child. No one is going to push this on you. If you decide not to get the vaccination, then as everyone else stated, be smart and wash your hands (and your family's) frequently. Get plenty of rest, lots of fluids and take your vitamins. The biggest thing to watch for with the H1N1 right now is a high fever, especially if it comes on fast - call your doctor immediately. If you are really concerned when being out in public, don't be afraid to wear a surgical mask and rubber gloves. It's more important to keep you and your family healthy than worry about looking silly out in public. Generally anyone with high risk for infection should be taking extra precautions now with or without the vaccination and that includes pregnant women.