The accounts tab is getting some love too, as part of the ongoing refinements to the user page.
Step 1 was a lot of background work (making associations faster*), we're now into Step 2 which is the UI.
Area 51 associations still work (you'll get the +100 bonus and all), and will be back to being displayed
within the next day or two very shortly across the entire network.
*Most people probably wouldn't notice, but once you got to 10 Stack Exchange accounts or so each new one was costing you about 20 seconds of your life just to establish associations.