I'm definitely excited to read more by Egan, and already own a few of his other works. I just tend to binge on sci-fi and haven't been in that mood since, well, not-finishing Permutation City.
I originally bought Permutation City because of a recommendation on HN. Schild's Ladder might have to be my next sci-fi read for the same reason. "Sheer conceptual interestingness" is pretty much exactly what I want, haha.