This weekend I downloaded Wikipanion from Apple's App Store. I needed to look up info on the move, and I felt that searching and scrolling through Wikipedia on the iPhone's Safari browser was pretty close to impossible. You have to zoom in, and scroll around to read, and then zoom out to figure out where you are on the page.
Wikipanion made it fast and easy for me to search for information. And the plus is that it quickly loads the page in the App window so all you have to do is scroll up and down to read. It also has a table of contents, or quick links right to the section that you want.
I was able to, in the settings, adjust the font size for best reading, and with its History setting, I can go back and change the font so I can view it even better in landscape mode.
I give it a thumbs up.