I have found this on several search engines:
you type in some popular keywords, say
vista activation crack
the search engine gives you pages with
various URLs of the form:
users.someisp.com/jbloggs/games.html
freeadsl.de/hinkel/zuhause.html
www.boringhobby.org/links.html
The summaries look rather like keyword-stuffed
pages. When you click on one of these, you do not
get the users.isp.com but instead "search.ug"
and it is a list of 20 links such as
lowest prices on vista activation crack
and further down stuff like $2 Viagra
Now I would say these scumbags at search.ug
must have created thousands of bogus pages
which spoof the webcrawlers.
(They should have liquid nitrogen poured on their
naughty bits).