Facebook has so far focused mainly on college students, but it's preparing to open its figurative doors to any and all in a bid to expand.

Facebook had planned to roll out its expansion today, but has postponed it after new features introduced last week resulted in uprisings by tens of thousands of users, reports the New York Times. Though it moved quickly to assuage members' concerns, Facebook has wisely decided to introduce this major change more slowly - within the next month. Facebook Founder Mark Zuckerberg is quoted as saying the intent is to retain members once they graduate and go off into the real world.

Facebook will create new "networks" for 500 geographic regions, allowing anyone to join them. People in a region - say the Boston area - will be able to see the full profile of other members in the same region, but that default setting can be changed. Unlike the larger, more freewheeling MySpace, Facebook shows personal information only to users' friends and those in their network.

Facebook membership was first limited to those with email addresses issued by a college; it has since accepted member-invited high school students as well as people who work for some large companies and nonprofits.