I actually prefer the mobile versions that let you set font size on mobile. For example, when zoomed out in HN comments to a level where I don't need to scroll horizontally, the text is impossible to read on low DPI devices like my 3GS. HN would benefit from this. But I hate not being able to zoom. Perfect example, wikipedia. If sites offered a version like the iOS Safari reader gives you, they would be a plus. Unfortunately, most get it wrong.