Forward it on to Mini would be the best thing, for the life of me can't think who the other administrators are! I know Isobel and DQ are.. so hopefuly one of them will be around to look at it, so perhaps forward it to all three of them?
Yes, forward it to Pierce, though I'm not sure he can actually do anything about it.
I can't see how a spam robot could pick it up as your email is hidden, but the spammers do actually sit at their desks all day long guessing people's email addressses.