This is a d3.js visualization of US zip codes.
Original zip code dataset from Geocommons.
5MB shapefile with properties such as zipcode, state, name, population, area, more.
http://geocommons.com/overlays/54893 (Thank you Bill Greer)
This converts it nicely:
topojson \
-p name=PO_NAME \
-p zip=ZIP \
-p state=STATE \
-o zips_us_topo.json \
zip_codes_for_the_usa.shp
@RussRezek and @roesler-stan I just spent several hours doing this, because I couldn't find any current open data online. Compiled and simplified topojson with makefile at https://github.com/storiesofsolidarity/us-data/tree/gh-pages/geography/zcta
Note, these are ZCTAs not actual zipcode routes.