You can edit the information that is displayed in your workspaces from your profile. You can also configure your personal newsletter, change the CommSy-Bar settings, and even terminate your membership.
If you are in a workspace, you will be able to see your name in the top right of the page in the dark grey CommSy-Bar (Figure 1, "Welcome, *your name*"). Clicking this link opens the "Edit profile" screen, where you can change various settings (Profile settings, user data, newsletter and CommSy bar), which can be selected via the tabs below the title bar.
Figure 1: Your Profile in the CommSy-Bar