I don't have much use for Australian science fiction writer Greg Egan. Not because he's Australian, mind. That's correctable and sometimes even endearing. No, Egan annoys me because he's a sectarian who converted to atheism, but kept his old structures of thought. In Egan's case, this is less caesaropapist-cum-Leninist, and more "here is a cunningly reasoned pamphlet I'd like to give you showing the error of your ways". Very Anglosphere. I don't think it's a coincidence that most of his fiction explores themes of eschatology and transcendence -- but without that nasty 'god' business -- or that it's been embraced by the "Rapture for Nerds" contingent of geekdom. On the other hand, Egan has done some very solid stuff for University of California physicist John Baez. Most recently, check out his animations of Klein's quartic curve, and his comparison of said curve to the Fano plane (scroll down).
On the third hand, Egan's fiction is not very good in several other ways. Why doesn't he reinvent himself as a Martin Gardner-like figure? He has the right mad math skillz and a similar skeptical convert nature. Ah well.