iPodia is a Wikipedia viewer for your iPhone/iPod touch. With this application, you can view articles in an optimized layout, find certain text in the article, and save the article as a data URL for offline reading.
Japanese. Wow, iPodia is on lifehacker.com!
Articles will be shown scaled to 50%. This will make the fonts a bit blurry, but keeping the pictures small and being able to zoom into them when you need to is very useful. It lets you see more text and the layout becomes much more natural.