There's a new module for Google Personalized Homepage - Search History Trends that shows the same information you could've find in the Trends section of Search History, but it's more accessible. What you can see: top searches, most visited sites (from Google searches), top gaining queries related to your searches, your daily search activity.
This module it's useful because it allows you to visit your favorite sites or search your favorite queries without looking in your huge list of bookmarks. And you can find what's new in your community just by looking at the related searches.
The trends are also available for the last week, last month and last year. A chart that shows the trends for each query would be a nice addition.
Related:
Google Trends competition
Google uses community to improve the quality of search