I just got word that the ZipCodeGuy is giving away his Zip Code Database for free! Zip Code databases are great when you’re targeting regional offers, such as gas prices, dating, or practically any zip submit offer. With this database, you can do tons of things, like lookup nearby cities and show singles that are there (well, not really, but the user doesn’t need to know that when they’re signing up) or their photos on a zip code map of the region (using Google Maps API).
If you’re lazy, combine this with an IP database and you have some pretty powerful info on your hands. Or scrape, I mean, reference city-data.com and show all sorts of info!
Even if you have no plans to use it, download the zip code database while you can!