The Notebook has added support for raw_input and %debug, as of 1.0.
In [1]:
    
# Python 3 compat
import sys
if sys.version_info[0] >= 3:
    raw_input = input
    
In [2]:
    
name = raw_input("What is your name? ")
name
    
    
    Out[2]:
Python 2-only: the eval input works as well (input is just eval(raw_input(prompt)))
In [3]:
    
fingers = input("How many fingers? ")
fingers, type(fingers)
    
    
    Out[3]:
In [4]:
    
def div(x, y):
    return x/y
div(1,0)
    
    
In [5]:
    
%debug