Yesterday Google Reader updated with more social features, including a "like" feature—but didn't give you a way to view all the items that you "liked". Reader Michel writes in with the solution.
To view a list of all the items that you liked, simply navigate to this URL in your browser to see the list of your liked items—no doubt the link will eventually be added somewhere in Reader, but for now you can see the list this way.
What we'd really like to see is a list of all the items that everybody else liked, sorted by the amount of people that liked them, but so far there doesn't appear to be a way to do that. Thanks, Michel!