Search and find an app or game for your Smartphone from the iTune Store or Android Market is a bit complicated job. To simplify the job, there is a new web service called 8apps, where you can find many free as well as commercial apps for iPhone and Android.
8apps displays icons of each app on the screen; just double click on an app icon to download it (from iTune Store or Android Market). To navigate further, just drag the icon.
The service is quite cool and convenient to find an app or game for iPhone (including iPhone 4), iPod, and Android.