Hi Faith,
I think your initial reaction was understandable given the presentation of the site but I don't know if this really constitutes Spam.
arno's site certainly deosn't seem to be selling anything but rather seems to have a number of thermographic images freely available for academic use.
Given arno's willingness to actually respond I don't think this is really 'spam' in a traditional sense. It isn't any more of an advert than a link to AIG is an advert for that site.
Having said that I also don't really see this fitting into any of the forums very well, it mostly just reminds me of the '
the evolution of clothes?' thread we had a few years ago in Human Origins.
So I wouldn't reject this out of hand as spam but I might be inclined to put it into miscellaneous topics or even coffee house.
I'll leave it with you, if you still think it is too Spammy then fair enough.
TTFN,
WK