It would appear that some time in the last hour, Facebook has added more filters to the Home Page feed. If you mouse over the upper-right of any feed entry, you'll notice the "X" is missing, and instead, there's a drop-down that says "Hide". Click on that, and you'll notice the option to hide all of a user's posts, or just particular feed item types.
For instance, if you just want to hide a person's Delicious bookmarks or Google Reader shares, that will appear next to the Feed item entry for that share. Right now the types of posts seem to be limited, and Facebook has not provided an explanation as to the extent of the filters.
In this example, I can hide the user, or the service.
This change is just one step in a line of improvements Facebook has mentioned they were moving towards, in light of users' near revolt over the social network's new interface. In addition to more filtering capabilities, Facebook is still looking to make the Feed more real-time and is improving the highlights on the right-hand side of the Home Page. The new filters seem to be quite limited at the moment, but my hope is that we'll begin to see many more options to enable you to have greater control over the data you see as you log into Facebook.
Read more by Jesse Stay at Stay N' Alive.