Spencer - 2:24 pm on Feb 24, 2011 (gmt 0)
We have one complete removal ! No site: listing whatsoever. This seems to have happen on the 17th of February. The site is 6 years old, a personal artist page with no adverts, 4 links to our other sites / services and a good bunch of art site incoming links (PR2 - PR5).
According to the site stats there does seem to have been a surge for 2 weeks prior to the 'kick'. The site only gets around 10-20 visitors per day, so not of much interest to us ... but it might ring a bell for someone out there :-)
I'm wondering whether the recent ups and downs have been the result of a large purge (maybe bad behaviour reports being acted on) and the resulting loss of link juice.