Google seems to be undecided about the purpose of the navigation links (also known as "corner bookmarks") from Gmail, Google Calendar and other applications. While the only change I see is the replacement of Groups with Google Checkout, other people saw links to Google Reader, Google Maps, Blogger and other services. Maybe users should select their favorite services and the navigation links should be displayed consistently and extensively. It's weird that Google tested a page that let you customize those links but decided not to use it.
