Facebook began as a social networking site for just the students at Harvard and then, you know, grew a little. Well now there's a social networking site for your very own neighborhood.

Or YOUR very own neighborhood.

Or YOUR very own neighborhood.

What a cool service. And think of the possibilities.

If you're looking for a babysitter or wanting to advertise a garage sale or if you see something suspicious.

Here's how nextdoor.com works: