FriendFeed now lets you individualize your account with six new designer themes. When you select a theme, your FriendFeed account will always include your theme, and other people looking at your profile page will see it in whatever theme they have chosen.
FriendFeed says that it plans to allow users to customize themes down the line as well as give users the ability to create an entirely new theme. Twitter and Gmail also let you add themes and designs to your homepages but some of FriendFeed's themes have a nicer design, in my opinion. On the other hand, Gmail has a good amount of variety when it comes to choosing a theme. The advantage to Twitter's themes is that you are able to choose multiple designs in different colors.