Has anyone integrated Google\'s Maps Data API available here, with iPhone application. If so can you please share the skeleton code to get an head start in my application?
The Maps Data API doesn't do what you seem to want to do - search for nearby points of interest, rather its a way to save and query your geo data.
You'll probably want to take a look at the Local Search features of the Google AJAX Search API. This section talks about how to use it as a web service, which you can access from your iPhone app.