Google AdSense announced they have updated the design for the link units and landing pages that those link units end up on.
In short, the link units are now easier to read, have less keyword suggestions and are more spacious.
Here are before and after shots:
Before:
New:
As you can see, the difference is pretty noticeable.
They also revised the landing page when you click on the text links in the AdSense link unit to look more like the new overall Google design.
Forum discussion at WebmasterWorld.
