The funniest one Ive seen is payday uk wiped out of search
The above happened a week or so before the webspam update mate so not related. (Marcoose beat me to it above).
IMO the screw up here is that for years the only way to compete in google was to get links with anchors. Then overnight they hit any site that has done that.
How many affiliates in the past 3 years have gone out and asked sites for links with "www.brand.co.uk" as the anchor instead of "money term" - hardly any.
A lot of brilliant sites gone and a load of old untouched and now outdated sites replace them. Rubbish! lol