One type of nonsense text used as a placeholder is the Lorem ipsum text. Used to check layout and overall appearance before the actual text is inserted, it is based on a piece of classic Latin literature. Lorem ipsum in page layout provides a stand-in for the final copy in templates and page layouts. It's also used to display type specimens.
As originally created the Lorem ipsum text matched the average frequency and pattern of word lengths typically found in the English language. This was intended to give a fairly accurate visual impression of how the document would appear without being distracted by real words.
2 Lorem ipsum placeholder text versions to use: [lorem.txt - 3 repeating evenly sized paragraphs] [lorem2.txt - 10 paragraphs of mixed length]
"Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi... "
