Track copyright infringers with Copyscape; it's powered by Google Alert. (What you do with the miscreants you find is up to you :-))
I haven't used Copyscape extensively; I will when I get a free moment. I tried it on this blog's URL, and it worked brilliantly. It's fast.
This is from the site:
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Copyscape finds copies of your content on the Web. You can use Copyscape to identify sites that have copied your content without permission. Copyscape will also show you who is quoting your site. Simply type in the URL of your original content, and Copyscape does the rest.
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