Charles Stross has posted a short story called Bit Rot on his blog - apparently this is the missing link between Saturn's Children (review here) and the soon-to-be-released Neptune's Brood (sorry, haven't read it yet).
It's available from his blog (see link above, below, and on the picture to the right) in ePub, Kindle, and HTML format.
The short is entertaining enough if not overly complex, but is, at least for me, screaming for more (and no, I don't think Charlie will find time to flesh this thread out anytime soon).
Links: Charles Stross - Bit Rot - Saturn's Children - Neptune's Brood