Also, looking at the various comments on Mainspring [ Powell's | Amazon ], I find it interesting that some people read the book as Christian allegory or apologia or some such. To me, the whole concept of an absent God is very much against the grain of Christian thought. I don't object to these interpretations — far from it — my conviction that the story belongs to the reader is very sincere. I just find them interesting and unexpected.
(For another treatment of the absent God trope by me, check out the short story "Jack's House".)
Finally, don't forget the latest caption contest. Some of the comments already there are crazy funny, so even if you don't want to enter, pop over and have a read.