The main theme from Tron is appropriate because the whole plot revolves around the creation of a entirely digital world/city.
Really like the idea of using music from the film TRON: Legacy - however I think something like "The Grid," which immediately follows this track, would be even better with the following lyrics in Jeff Bridges voice:
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer. What do they look like? Ships, motorcycles. With the circuits like freeways. I kept dreaming of a world I thought I'd never see. And then, one day... I got in.