I'm starting this thread as I read one of the 'Keeping it Real' - Justina Robson - series of books recently and couldn't think whether it should be in a Podcastle thread or an Escape Pod one.
[Incidentally, I should note that I don't think the Keeping it Real or the other books in the series are the best written by any means

but I like the mix of 'proper' magic and fantasy elements with high-tech that she uses.]
Do other people have favourite cross-genre stories? (I'm thinking more of ones that mix extremes like fantasy and science, as something like 'horror' could fit equally well into both. and often does.)
I suppose another contender would be Philip Pullman's 'His Dark Materials' books, since characters use science, machines equally often as 'magic' and other dusty ethereal devices.