The UI design and touch screen are what drew me into getting an ipod touch for developing. The user interface design and feel of the iphone operating system set the bar high for future applications. How could one not try to live up to standards preset in the default menus?
And the touch screen? Combined with the graphics capabilities, accelerometers, easy to use SDK, and app store, it is an experimental indie game platform waited to be exploited.
Consider me hopped.
Besides, I enjoy a good puzzle as much as the next guy...