Katie, I'm pretty sure we've had a few threads in the DDC about this that you could look at as well. Try searching the group and the old forum.
-Did you decide to vax? Why/why not?
We started selective and delayed vaxing with dd, but we stopped when she was about 6 months old b/c our guts told us to stop after doing some more research on the subject. Ds1 has only received the tetanus mono vax when his toenail was ripped off by a metal door. Ds2 will also not receive any vaxes unless necessary.
We came to this decision through research on each vax- the pros and cons. I recommend Sears' The Vaccine Book to learn about the vaxes. I also recommend the several Mothering Magazine articles that covered vaxes (I believe I put links in the previous vax threads). Like others have mentioned I would like my children to have natural immunity to those diseases that are actually around and am not worried about the diseases that are extremely rare. That being said, we are not anti-vax completely. If there is a very good reason to vax then we will when necessary- like to travel or when they are approaching puberty and have not received immunity to mumps (the boys) and rubella (dd). I feel a whole lot better about vaxing an older child than an infant.
-If you decided NOT to vax, are you afraid of your child(ren) getting sick from vaccine-preventable diseases? How do you deal with that fear? What other preventative measures do you take?
Most of the diseases are nothing to really be concerned about- people used to get them routinely as children no problem. The more concerning diseases are also the ones that are very rare. I don't have fear about this any more than I have fear about any other variety of illnesses, injuries, etc. that my children will have to deal with. Preventative measures include limiting exposure to disease (like don't take an unvaxed child to another country where the diseases are prevalent), boosting immunity, building immunity, good nutrition, hand washing, cleaning, education, etc.
My bottom line with this issue is to trust your instincts and if you're in doubt, delay!! You can always vax later, but you can't take them back.