This article speaks for itself, I think.
However, regarding the title of this blog post, I should specify (since there are multiple possible definitions of the word "abyss") that I'm using the following definition (from the American Heritage Dictionary of the English Language, Fourth Edition):
"The abode of evil spirits; hell."
abyss. Dictionary.com. The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. http://dictionary.reference.com/browse/abyss (accessed: March 19, 2009).