I'd say keep it. NANOG's archives at Merit are probably more stable than many mailing list archives I've seen, but it's possible that something will happen to it in the next 5-10 years that kills it. Multiple copies of list archives aren't a bad thing, at least for relatively low volume lists like NANOG. Old archives aren't usually highly useful, but once in a while they can provide good insight into the "why did they do that" sorts of questions. The archive at gmane.org munges @ charactes into " <at> " in an attempt to reduce spider infestations, and it's probably not a bad idea except when people are trying to explain specific syntaxes that this garbles. Bill Stewart.