Click the 'My neighborhood' cube.
Click the 'Residents' module.
You can see the people from your neighborhood who are also registered for Cubigo. New people are displayed in bold. See What does a bold line around an item on a list mean?
You can reset the new residents counter to zero by clicking the 'Mark All as Read' button.
Click on a resident who is not a friend in Cubigo. You can see his or her data, as described in How privacy is controlled in Cubigo, you can invite the resident to become a friend or add the contact to your home screen.
When you click on a resident who is your Cubigo friend, you will see more details.