Why would a pregnant woman not be able to eat soft cheeses? I just finished preparing a wedding today and one of the specs was that the bride (who is pregnant) was unable to eat certain types of cheese. Goat cheese, Brie, and Camembert were all no-no's but hard cheeses were OK.

I should know why and I suppose I could google the info also but I'd prefer to put it to the floor.  Why could this lady only eat certain types of cheese?  I'm assuming the fact that she is pregnant holds a clue.
Everybody has different rules for what pregnant women should and should not eat, and you definitely should clarify with the individual.  

Usually the concern with cheese is over bacteria.  The typical rule about cheese is to avoid softer, raw milk cheeses for fear of listeria, which can affect the baby.

There is more information here: http://americanpregnancy.org/pregnancycomplications/listeria.html