While I agree it is a lot of work it could be part of the theme to make judgement on this.

Then, a theme could modify even settings of application. For example, in a file manager one generally wants a list view on a desktop or stylus-touch because it gives details. But in a finger-touch environment one would want to see maps. In the same way, a theme can do this for RSS applet, Modest (e.g. the scrollbar but also size of the messages to click on). If you build this functionality in the definition of the themes you allow both worlds, and the community can extend on the work with both camps being happy. Likewise, the stylus-fans will have easier work to get their way of using the device.

Some things must be researched: the size of a finger, the way most people use a touch screen with their finger. Some way to callibrate this. This is so the device can adjust to the user, so it gives optimal experience, because not every finger is the same. But thats perhaps for longer term.