Amen! It is so difficult to read long stretches of text that I suspect many interesting and/or informative passages are skipped over by a majority of readers. It is a courtesy to the reader to break text into paragraphs, making the writing more readable.
The Purdue Online Writing Lab is one of many sites with more information on writing style. Here is what it has to say about paragraphs: http://owl.engl … resource/606/01/