UPDATE: Note that we weren’t meant to see these new features just yet. As they were rolled out, Feedback took quick screenshots and analyzed the changes. Shortly after (as in, minutes) Facebook took itself off the internet for nearly 30 minutes in order to fix the changes, saying some prototypes had inadvertently gone live.

Hello from snowy Virginia!

Facebook unleashed a number of interesting tweaks today, but none so significant as the addition of the Page Login concept for administrators of Facebook Pages.

Now when you visit a Page you are an admin of, you can actually comment as you (previously when admins commented on a Page they administered it only posted as though the Page itself was responding). You can do this because you have an option to essentially login to Facebook as the Page.

When you do this, you then see the world as the Page, complete with a newsfeed wall – and in fact all of the Notifications are now the Notifications of the Page.

As the Page, you post as the Page, Comment as such, ask Questions (now integrated into Pages) and more. So now that you ARE the Page, how do you get back to being you? In the upper right, you can switch back to yourself, referred to as the, “primary account” and login.

Other tweaks to include the disappearance of Tabs; Photos accessed through Notifications create a pop-up window for browsing; and a new face-recognizing, Photo-tagging feature is also being rolled out. There’s a new version of Comments, based on Questions, being trotted out as well.

An example of the new pop-up photo viewer

The Next Web has more on the changes here.

-Dean (@dbrowell)