Well-designed, peer-reviewed code. Contains a full Xcode project which you can use as is, or customize as you want. Full of useful tips and tricks.
Pins are clustered together for a cleaner interface with less visual clutter. As the user zooms in, the clusters expand to individual pin locations.
Includes a web-based admin interface (written in CakePHP) that is easy to install on most webhosts and allows you to painlessly add, update and delete locations. Locations app automatically checks for updates, so your users always have the freshest information.
Drop me a line at: email@example.com