Well, you spoke, we listened, we coded.
 
The DaVinci's Secret Machines in-game level editor is almost done. Saving and loading of levels work fine, just putting the finishing touches on the user interface for choosing a level that you have saved or someone has sent to you. 

We are looking to implement a challenge mode where you send a custom level that you created to others using OpenFeint. The way the editor works now is that you basically set up your scene with your objects (full palette of objects available), then click on the objects in the palette that you will want available for the user to be able to have at their disposal to 'complete' the machine.
 
So the most intuitive way to create a scene is to have a fully working 'machine', then remove the pieces by dragging them back to the palette, and setting the palette object to have a certain number available. We'll post some screenshots once we 'pretty' it up.