I noticed this morning that there's been some changes in the layout here overnight. I found the following over in the Social Strata help blog.
New Sign-In Bar
The sign-in bar at the top of all pages has been given a face-life. Things are a lot less cluttered now. Here's what it looks like:
The search box has moved from the left side to the right (that's what it says but mine's on the left side) And the "Dialogs" section has been moved out of the site menu bar and into this sign-in bar. The box will be highlighted if you have new dialogs, which should make it easier to discover. Similarly, alerts have their own box in the bar, and the box will be similarly highlighted if you have new alerts.
Finally, if you are signed in, just hover over your avatar or the gear icon to display an edit profile link and a sign-out link.