Stross who helped popularize the Singularity meme in SF has lately been somewhat critical of it, I think the story is a clever way of "having your cake and eating it too"...having a post-SIngularity society and not and reflecting upon it. I think we need a lot more of this type of exploration with Singularity's themes, humor is a good way to accomplish it, because the implications can be epic or grave.
Interestingly, the reviews for the story are very good in the critical realm (Publihser's Weekly, starred review Booklist, Library Journal, Barnes and Noble reviews, Quill and Quire linked below, et al), fans tend to have a lesser opinion, but in both cases the story(ies) are agreed to fit into the general pattern of exploration of the individual writer's and are a worthwhile addition to their milieu. This story is not their top work really, but I simply couldn't pass up the summary...the one I quoted.
Barnes and Noble reviews:
In this milestone novel, Stross and Doctorow have risen to the perpetual SF challenge of portraying a world utterly estranged from our present, yet still somehow our must-be- acknowledged illegitimate bad seed spawn. They've raised the bar for all who follow in their footsteps.