Strange comments from Strangers

If you would look at some of the very old posts of my blog closely you would see that people that I dont even know have left there comments on the blog. There is a shocking similarity that I have found in all of these comments. The comments have come on the following posts -

1. Another blog...boo hoo
2. My Music
3. What is Google Base?

All these comments seem to be very nice like -

"Great site lots of usefull infomation here"

"Your are Nice. And so is your site! Maybe you need some more pictures. Will return in the near future."

"Your website has useful information for beginners like me. "

All of these comments seem to be very nice, but one think was very strange. All these comments had links in the end, and the text for the link was ">>" in all of them. The website to which they have linked are -

1. http://jest.at/nachtclub_dortmund.html
2. http://ery.at/rimmel_london.html
3. http://ising.at/aktie_aktie_geld.html

Which open the same or very similar looking websites. Also, if you view these blogger's profile then you would notice that even though they have been on blogger since July 2006 there profile views are ranging from 1400 to 1600. None of them have put any personal information and when you click on the link for there blog it gives "Error:404" that is "Page not Found".

After seeing this information it is quite obvious that they are bots. But as there blogs are not opening they are totally not trying to earn more moneys on AdSense. There is no other personal information on there profile about there homepage or some email address. They seem to be bots with no purpose. That is very very strange.