The dwindling Fibonacci
There is indeed room for improvement, however slim it may be.

Get rid of the list

import sys

highest_fibo = int(sys.argv[1])

f1 = 0
f2 = 1

for _ in xrange(highest_fibo):
    f1, f2 = f2, f1 + f2
    print f2, 


If you want to make it even simpler, there is even a function to compute fibonacci numbers and if you are interested, I leave it up to you to find it.

Before I go, I think I should explain this part which may seem confusing:

f1, f2 = f2, f1 + f2


This takes advantage of tuple assignment in python. The process begins by creating a tuple of both the left hand side and the right hand side of the expression. Then the right hand side of the expression is evaluated. Then the process of tuple unpacking begins where in each value on the left hand side is assigned to the one on the right.
This simple python trick allows for us to write a one line swap