Weeeelll. I still don't think it should be in there, because of my second two points above, and it's still not actually referenced! -) Consider whether it's the sort of thing you would expect to see in an encyclopaedia - I'll leave it alone for now and we'll see if a consensus develops. (Nice work on all the references, by the way. I think we could lose the 'No refs' tag at the top of the article, don't you?) 4u1e