wiki engine of bw parses text without encapsulating blocks of text into <p>...</p>, it adds <br/> instead. so it's quite difficult to style your paragraphs in content, as there's none of them according to the markup. There're nor indents for the first line, neither any padding or margins. In long pages it creates "wall of text" effect, which is not nice at all. usually it makes people to add double breaks, like <br/><br/>. more readable, but not very stylish.
What can be done in this case?
As a bit more versatile solution I can offer you to style the <br/> itself with CSS.
The first method I came up with is .content br {display:block; margin-bottom:VALUE;) rule. This works in FF2, but I'm not sure about other browsers. It doesn't work in IE6, as far as I tested it.
the better results MIGHT be achieved with selectors like :before or :after, but I have no time to test this ATM

P.S. I keep forgotting that there are no " allowed in the names of the wikipages, even after I stumbled over it so many times on my site. Unfortunetely, the engine doesn't test this on submitting