Usability 
The mobile edition of the popular social bookmarking and news agregation site Reddit.com comes in two flavors,
m.reddit.com (first image, below) is the legacy mobile version with a front page size under 20 KB and no JavaScript dependencies. It's a read only view of all of Reddit's items, "Other Reddits" (subject matter categories) and comments.
i.reddit.com (second image) is Reddit's AJAXy new "Touch Web" version that requires JavaScript and a browser that can handle 200 KB pages. Compared with the legacy version it offers more eye candy and the ability to log in to post items and leave comments.
Screenshots
