johnhh - 9:12 pm on Oct 2, 2011 (gmt 0)
I would say there is a difference between linking to Wikipedia , which then links to other external sites, and linking to those external sites themselves.
For the record, we don't have links to Wikipedia, but they have links to us.
I don't see see this as a major Panda factor, there are other things at play. Google has already said, I believe, there is nothing any affected site can do. However, this is probably not true, as it's just a computer program.