Yesterday Facebook went down for a few minutes, but not before some users started to notice various changes throughout the site. It appears now that the social networking site pushed some features that they didn't intend and reverted them back soon after. Mashable has a gallery of screenshots provided by users, showing what have to be a bunch of upcoming features that Facebook plans on rolling out. While they have all been reverted, it seems like Facebook is testing new Fan pages, the memories service which allows users to view photos grouped by year, a lightbox photo viewer which zooms into pictures without loading a new page, and an outside news feed in the filters list.