Solid coverage from The Mumpsimus regarding Readercon:

Jonathan Lethem Samuel R. Delaney said that he read a western story by Theodore Sturgeon that, in the first half, was a beautiful Sturgeon story, and then in the second half was also a beautiful Sturgeon story, but a different one, and the experience of reading this story then made him want to write a western that was more unified but still beautiful, and this impulse was enough to get him thinking about something new to write [I forget what he said it was came out of this — maybe one of the stories in his first collection]. Writing, he said, comes from an urge to write something like someone else who inspired you, or to fix something that you read by someone else.

[UPDATE: It was Delaney, not Lethem. Thanks, Kathryn!]