Wikipanion

Accessing Wikipedia has never been faster and easier than with the Wikipedia application, designed for easy search, navigation and display of Wikipedia entries. Featuring easy to read custom formatting of pages, quick section browsing, searching, search auto completion and more. Entries load much faster than with the Wikipedia web page, and you can start your search immediately.

Features

• Large, easy to read text
• Fast, loads minimal extra data
• Section browser to quickly jump to any section quickly
• Autocompletion searches Wikipedia, so results show up even if it's not in the article title
• Auto search if page doesn't exist
• Loads images at a good resolution for the iPhone
• Safari-like page navigation

Download it for free off of the iTunes App Store.