This thread is for you to post cool/useful examples of how to accomplish things on the mobile platforms. The code examples can be for any mobile platform not just the Windows based platforms.
I came across some demonstrations for coding for the Windows Phone which, can be found here.
Some code examples for OSX, etc from Apple can be found in the Apple Dev Center.
Found a useful tutorial on codeproject for beginners using the Android Phone.
More Android examples are linked to in post #2.
akhileshbc's tutorial on J2ME programming can be found in the third post.