Marshall McLuen was wrong. It's the message, not the medium, which is important. Remember, most PDA Web users will be asking for information. Concentrate on getting the information across. Layout, creative use of white space and clever typography simply get in the way.
Relevance means making every word count.
Doing this for a variety of devices all with different capabilities effectively means composing pages for the lowest common denominator. You can download it for free from the Palm site. It enables you to see what your pages will look like as you compose them without synching them to a real Palm first. As information delivery devices, the constraints imposed by PDAs extend beyond screen size. In general, they do not support a choice of fonts.