I've also found that the registrant listed above is the current registrant of EXENEDEN.COM who has also been listed on several more sites for running the "CoolWebSearch" exploits and others.
More info can be found at these URL's:
http://www.google.com/search?q=Exeneden+Group
http://forums.maddoktor2.com/index.php?showtopic=6308
http://spyware-free.us/files/cws.txt
Browse through the google results and run a few searches yourself and you'll find quite a few lists of banned and blocked domains including that domain and others they own.