In the recent past I mentioned a great open source example for beginners interested in using the Map Kit on iOS devices, and utilizing several open source projects.
I’ve come across a couple of excellent beginners tutorial on how to parse an XML feed, and display the contents on the map. Another giving a good explanation of the Map Kit class and several code snippets for solving common Map Kit problems. These tutorials take a different approach form the open source example that I mentioned, and no libraries outside of the iOS sdk are used.
The tutorials are from Azam Sharp and can be found in 2 parts here:
Great stuff if you are just beginning to use the iOS Map Kit.