The Opera web browser for Smartphones and PDA's is really amazing. Just about any page I have pulled up on it looks good and is readable. Much more useful than the default browser that came with my Nokia 3650.
The Windows version of the Opera browser has a very nice feature that will preview any web page as it would show up on the Opera handheld browser. For example, the image to the right is how this site looks on my Nokia 3650.