I 'lost' my PR7 site (in google)last july. At that time tried numerous searches (including inurl:mysite.com) with no sucess.
But thanks to this thread, tried it one more time.
Lo' & behold, found some strange redirect from a site like those described earlier.
Plus when I visited the site it tried to install some spyware! No contact info. and whois protected too.
Sent recent e-mail to google so we'll see what happens-not holding my breath..