Worms and Evolution

Here is a well written post by a science blogger about the importance of worms in evolution.
John Hawks has already posted on this, but in case you missed it the post begins with this question:
Quick - What was Darwin's most popular book?
Click below to find out - you'll probably be surprised!
http://scienceblogs.com/evolvingthoughts/2007/01/in_the_mud_1.php#more