Last month Koby gave an “Intro to iPhone development” at the Houston Open Dev User Group (you can watch it here). This month Koby was back to show how to write the same “Twitter search” app using MonoTouch. You can watch his presentation here:
While it’s sort of nice to write C# code instead of Objective-C, the big thing about using MonoTouch is that one can reuse a lot of the code (such as business logic) between iOS and Android applications.
Besides Koby’s presentations, you may also want to check out these two articles that show you how to build a “Twitter search” app, both for iOS and Android: