In your admin homepage you should find the new users in the middle column. Clicking the usename link will bring right into the user detail page. Another way is go to User -> Users. In the search text box enter any keywords such as user first name, last name, email, address etc. You could use Date Range to fine tune the results. Click "Go" button and you will be given a list of users matching the search criterias. If you leave the search text box empty, it will bring all the users within the Date Range that you specify. Click "Edit" button on the right side and it will bring up user detail page.