I just uploaded a minor update to the xpageswiki.com App for iPhone and iPad with the following changes:

iPhone - fixed: on some devices, the content was not loaded from xpageswiki.com. 
iPhone - improved: made the header bar in content pages smaller to improve readability 
iPhone - improved: optimized font sizes a bit. 
iPhone - new: zooming is now enabled for content. 
iPhone/iPad - new: color coding of source code that is embedded in content pages

Especially on the iPhone the content is much better to read now.
Karsten, in spite of what I said earlier, I managed to enable zooming while keeping initial readibility :-)

Now we have to wait for Apple to approve the update.