I'm really curious too. I'd love for the whole thing to get some more attention, at least then we might get some definiate answers.

All the tweets are being posted by tweetfeed, which suggests it might just be badly bade spam rather than an encoded message like I thought. Seems to be a stupid amount of energy going into making some very bad spam though.

Ed2: The site loads JS resources from http://chitika.net/. The username of the advertiser is "artemkamen", which is something.