leadegroot - 8:38 pm on Dec 12, 2006 (gmt 0)

It doesn't surprise me at all - Matt Cutts has hinted that this would happen.

Interestingly (and its only a sample of one), I had a link removed from a wikipedia page - and the traffic to that site from Google increased afterwards. Almost as if having a link on Wikipedia is actually a negative filter point...
Probably a coincidence, but I hadn't been working on that site anywhere around that time...
I don't think an algorithm of 'only in external links, re-added a few times by same user, etc' would be too difficult given the public history of each page on the site