User can select neighborhood data through a suggestion box

Hi,

I am building an app that needs an user to select a preferred neighborhood in US through a suggestion box. Most likely we are NOT going to use maps. From this selection I need a geo location using which my searches will be executed.

By default to start with I will retrieve user's current location through geo location api and will need to fetch a corresponding address from OSM using this location. In absence of geo location I will use ip based location / address detection.

Can I achieve this with some OSM api or even a data set available (preferred). We are inclined to use lucene's geo spatial searches to achieve this.

Any help will be highly appreciated.

thanks..