Running a whois on them brings up a privacy service.
Site in question is 1whp.com
That won't help with previously stolen content, but they won't be able to continue doing that in the future.
Also, this works as an interim workaround until one figures out where to send the cease-and-desist letter. ;)
and add links in your content linking previews your own articles. After all.. free links for you
As far as serving junk content to that IP, its a waste of time. As your blog gets more popular you'll start getting more and more people ripping your content. The time you spend trying to beat these guys is better used elsewhere.
My advice, get a few high quality links going to your domain, this will come naturally over time. It will really let the search engines know which domain is the authority and which domains are just stealing content.
You could try sending the webhost a DMCA takedown notice notifying them that 1whp.com is displaying your copyrighted content. Although any host that displays Adwords (with a "Dont forget to check out the competition before deciding on us :)" message that probably violates Google's TOS) is pretty spammy themselves, and they appear to be Australian so probably aren't too fussed about US copyright legislation.
Or remove the splog's reason for existence by sending the DMCA takedown notice to Google...