Here is the website for MonoTouch; a framework that lets you write .NET apps for deployment on the iPhone.
I assume that this is not a joke.
Bill wrote a good article about managing iPhone provisioning profiles here.
Here is a detailed article about setting up Gambit-C to run on the iPhone.
If someone runs this then please let me know what you find.
Here is a great article about Smalltalk (Squeak and Pharo) on the iPhone.
Pretty exciting to see what might be possible on that device.
Here is one example of a handheld UI approach: a stack of cards.
They used a slider that seemed to better fit the app, too.
The runtime is up and running on the device and the simulator.
This post describes what might be the beginnings of developing in Eiffel on the iPhone (Manu is a prolific Eiffeler, and works for Bertrand Meyer’s company).