Yes, you are more likely to pick it up when pregnant, 20 times more likely according to the NHS guidance I just found online.
So, if the risk across the whole population os 2.7 per million (from the Zoe Willimams article) and its 20 times, that's 54 in a million, or 1 in roughly 20,000.
Now that's dodgy maths, because pregnant women were included in the 'whole population' sample and risk varies widely compared to diet.
But, let's assume its one in 20,000. That's a pretty low risk. In 2006, road deaths in the UK were 5.4 per 100,000 (according to the ONS), again roughly 1 in 20,000. A pretty much identical risk. So, your risk of dying in a road accident is as high in a given year as of getting listeriosis when pregnant, even if you eat normally.
Of course, you want to do the best for your unborn child and bring that risk down. But the big point in all this is that recent outbreaks came from butter and lettuce. Not goat's cheese, whether with or without a rind. If you genuinely want to reduce your chances of listeriosis during pregnancy, changing your cheese consumption is a teeny, tiny change. You would be better of altering your diet re ready meals, buffets, and bagged lettuce (as mentioned above).
I feel really strongly about the advice guilting pregnant woman and making them feel it's all on their heads. I also feel that, however well meaning, advice about 'it all being the level of risk you are comfortable with' is misplaced. Would you ever hear someone say that about getting in a car whilst pregnant, or crossing the road?