CSS frames
I am a big fan of creating websites with CSS. You may know, that is possible to have a frame like behaviour without having real frames using the iframe tags.
The secret is to put some divisions at the right place and to give the right properties. It results with only having one section scrollable and the rest of the site will remain and keep a great design. A good inspirating example is given by Stuart A Nicholls.
I have made a design using that technique and was testing it on the iPhone. But anyhow I did not know how to scroll the scrollable content. By accident I took two fingers, and that’s it. You can scroll those areas by using two fingers!