So, another book review.
Darn good book. Set apparently in the same universe as Accelerando, but not so much as you'd have to read that first, it covers the life of Robin, recently recovering from memory editing and deciding to take place in a psychological experiment/LARP in a 'dark ages' (our time) simulation.
The book has suggestions of Phillip K Dick-ian "am I real?" psychoses (if your memory has been edited, how do you know what is real and what isn't), plus it gives a nice reflection of our Antivirus-dependent computing society (Consider it an update of the network situation of Vinge's A Fire Upon the Deep). There's some good laughs at what the future "us" thinks might have been going on in the century from 1950 forward (nuclear families, gender segregation of jobs and household), and some great tech concepts, such as: if you have instantaneous wormhole teleportation, a blaster can be nothing more than a gateway to a star's surface.
I've come lately into Stross' work (having read Accelerando free online), and he and John Scalzi (Old Man's War) got robbed at the Hugos this year. This book has a great chance at next year's Rocketship-shaped award, if Scalzi's Ghost Brigades don't beat him to it.