The other day, I was talking with a friend of mine, whose a mathematical scientist whose proven a couple interesting things in the field of random prime numbers. He told me that links to his proofs on the Web were being removed from Wikipedia. This is becoming a repeating story. It would seem the folks at Wikipedia are internatizing their link structure and removing many useful external links. Whenever you review these occurances, the Wikipedia folk are referring to all external links as link spam. Wikipedia has enough Google juice and enough people that continue to link to them, that they are unlikely to ever disappear, but their usefulness as a portal to the Web is disappearing. Wikipedia is now a portal to Wikipedia, all links simply point back to Wikipedia.