Good tip and a very good use for SpyOnWeb.com.
That reminds me of a California SEO company who stole several of my SEO articles two years ago and published them on their site. However, they did not remove my copyright notices at the ends of the articles. I found them while doing a search for my name.
Many content thieves do not do it very intelligently.
How are you dealing with your content thieves?
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin