Allow users to specify tests like this:
Given
I go to Login Page
When
I fill the textbox "username" with "<>"
And I fill the textbox "password" with "<>"
Then
I see the div "greeting" contains "Hello <>"
With
| username | password |
| john | nhoj |
| paul | luap |
This would generate two scenarios (one for john and one for paul). It would also replace <> for the given username and <> for the given password.