All that great marketing doesn't make me want to sign in and create an account if I can't see quickly how much this service is going to cost me.
Something doesn't smell right here, I'm getting more and more dubious. It is clear you are just taking advantage of the failure of SimpleGeo to pimp your service on HN before your service is even ready to be pimped.
As for pricing: there's more to putting pricing up on a website. We have to calculate our own people and server costs, as well as build and integrate a billing system into the site. In addition, developers need a way of knowing how many API calls they've used, and a way to pay for the service.
In conclusion, simply putting pricing up and then having to change it later because we rushed to put it up in the first place would be worse than just waiting until the date we planned on releasing the site. I hope this makes sense, and we really appreciate your comments and concerns.
For now, check out the Open MapQuest API (based on OpenStreetMap data) for similar functionality. The example you're looking for is at the bottom of this page: http://open.mapquestapi.com/nominatim/#reverse
Here is a sample API query: http://open.mapquestapi.com/nominatim/v1/reverse?format=json...